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5. Jan 15, 2016 · No idea about tunability since Im just running it more or less out of box minus air mix. . The FiTech Go EFI System is the industry's Lean burn refers to the use of lean mixtures in an internal combustion engine. There are separate adjusting screws for the front and rear blades. It's the FiTech go efi 4 model with the fuel control module. Dec 09, 2016 · The fitech and the sniper are both great units, and are not some finicky contraption that constantly needs messed with. FiTech, Sniper, and Summit are ones I remember that have been discussed. However, there are many do’s, don’ts, and rules of thumb that can be frustrating to learn the hard way. Intake for FiTech always seemed odd like there were lean misfires ratio and get that part of the tuning process straightened out. All Fitech EFI systems have learning procedures that the system uses to adjust the active fuel tables it is using for operation. Boat runs fine at part throttle, idle, etc. FiTech - running rich, AFR not trimming? I did some testing yesterday with my replacement unit, and it's doing the same as the old one. Ok guys, I haven't had a chance to call fitech, just got all our beans out today, been pretty busy but I had a chance to play with it a little more here, the lowest the AFR's will go is 11. That's the base system from Fitech, which doesn't have any timing control. Any leaks in the intake system or bad injectors will also cause excessive HC due to uneven fuel distribution. Hey guys. (he replaces it and it’s still lean, he finds the header gasket, well, missing,or collapsed after 20years of abuse) Jun 11, 2010 · The LM-2 offers two outputs for sending data to other devices such as gauges or data loggers. Sep 07, 2015 · We break down everything you need to know about octane, including what it is, how it's done, the best race fules, and more. I purchased a MSD Distributor for the Chevy V6 and modified it to where I could use it. [GMCnet] Jim Bounds interesting recent posts I have been running a FiTech now for Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves - 593 reports. Don't get discouraged but absolutely get it running richer before you hurt it. I went through three pumps (on my 3rd now), but traced the problem down to sediment in the old tank, and replaced the tank and sender/pickup, which was no fault of the FITech. New to FiTechAnswers to help you understand the capabilities and features available115 Topics · 932 PostsLast post: fuel pump does not stop priming · 10 hours ago · gicknordon Aug 19, 2016 · The AFR Targets are used to give the fuel trim (fast closed loop fuel adjustment) a target and a multiplier. FYI my FiTech has needed really no tweaking except start up and the addition of a little extra fuel up top in order to run very well. Does this mean my O2 sensor went bad? Third Generation F-Body Message Boards. FiTech puts the engine and transmission EFI management back in your hands. He has a scope and can see the 02 sensor is stuck lean. This takes fuel from the existing low pressure fuel system and conditions it for the EFI needs. This will allow me to keep factory fuel setup from the mechanical fuel pump back. The results I’ve only put 120 miles on the FiTech so far, but I have to say it’s worth every penny. Feb 29, 2016 · Here is some real world feedback now that I have been driving it around town. Did some research on line and it seems a lot of people have an initial issue with their idle being too slow, my problem was just the opposite. If a specific lean cruise function is available, air/fuel ratios of 17 or 17. We the top 10 common EFI mistakes and how to patch them up so you don;t make a costly mistake. After a 15 miles test run it was doing pretty well. It is a Mark IV block running a mechanical fuel pump. Dec 12, 2018 · I have to give it gas for it to run, and when I do it runs EXTREMELY rich. Learn about this problem, why it occurs, and how to fix it. Changing the fuel pressure on an EFI System is an effective method of affecting engine performance and making more power. $800 for this version (seen it as low a $650) The other neat touch that Fitech offers is a fuel command center for about $350. 5:1. FiTech recognizes that not everyone needs or has 600HP or a Without an adequate cooling system, a lean condition can cause overheating, pre-ignition, or even detonation, which could cause porcelain failure. While it put down some decent numbers, it showed us that we were a little too thick on the fuel and needed to lean it out a little. 8 (which is leaner than I'd like), AFR actual is 11. Lesson learned: don't do the in-line fuel pump at all. Took me a few hours to make it work and work well it does. Please follow the post completely for details of the process. org member Jay_rich for winning December’s Car of the Month, as voted by ThirdGen. At steady-state highway cruise speeds, the air/fuel ratio went back rich at around 12. We brought in Mark Thomas and his 1955 Chevrolet Nomad to convert him over to EFI. Hey, I have a 416 stroker in my challenger, that is running very well with fitech. 6. When FiTech Fuel Injection started doing business, the company hit the ground running – at full speed. I currently set mine at 650 rpm's but I may lower it as I get more used to it. Only at www. Sometimes if there are outside problems such as bad misfires, exhaust leaks, or any other situation that could cause poor readings on the O2 sensor, the system will try to compensate in order to keep the car running. There are five factors that could cause a lean mixture to occur. I have talk with the tech guys at fitech and after trying what they had advised, it made the problem worse. There are plenty of people out there WAY SMARTER than I on tuning these things that can help. I was driving the other day and suddenly the AFR jumped up to around 17 and when I hit the throttle it went supper rich and sputtered. Being financially challenged, I preferred to be off a tenth running a little fat and run all season while the other guys scrambled to replace pistons. Aug 19, 2016 · The default calibration already has a background table that is set up to work pretty good “out of the box” but it may be too lean or too rich during quick tip-ins for certain engines. Once it's up and running and stays running it runs very well. I have a fitech dual quad on my 511 stroker with a tunnel ram. I thought it might be a lean issue, but the carb just ran fine and all the vacuum lines are capped Got my FiTECH 400HP setup installed this weekend. Along with the obvious advantage of moving the air-fuel mixture toward the source of ignition, quench also reduces rich-lean spots, averages chamber temperatures, and accelerates flame propagation. Therefore, quench area is certainly an important piece of engine design. FiTech was out first in the $1000 market and I got mine about the time Holley started slowly shipping Snipers. One thing to keep in mind: go too far and engine damage can result. org members. 19 Oct 2017 I will post some tips here as I think of them about my FITECH will think the car is running lean because fresh air is diluting the exhaust not  FITech hasn't been knowledgeable when my mechanic tried to deal with the idle-no load part of the fuel table as it is probably running lean. Dec 28, 2016 · Hello all. Also controls all timing advances and retarding needs. Fuel trim works in a saw-tooth pattern – for example if the engine is lean, there is MY AFR TARGET SAYS 13. As you can see, there is very little variation on either side of rich or lean, but as it goes from rich to lean the voltage output changes from 0. The FiTech 70012 Ultimate LS EFI kit is the ultimate LS ECU for DIY enthusiasts who want full control over their engine and transmission. Re: Holley Sniper or FiTech throttle body bank1 lean bank 2 rich if the injector pw are the same between banks? '04 Tahoe AWD, trickperformance turbo kit, TC78 turbo, 4"magnaflow muffler, Circle D triple disc 3,000, FLT LVL 7 4L60E, L92, 227/235 111lsa. Thanks for posting this. It is possible you are running lean over all and the 2 rich cylinders are another issue. Fuel is getting to the unit, at least up to the connector on the throttle body. 6 the entire way. Here the ideal reading again is 0 PPM. 3 and drops to 10. . This is a long-time coming and I'm a bit late in posting my findings, but hopefully this will be of some value if there is anyone else is fighting the dreaded "lean spike to rich bog" issue at low RPM's on tip-in. With some engines that we use in sprint races, you can run a little bit leaner to get more power out of them. From sea level to 7,200 feet over the Sierra Mountains. Some tuning issues would definately be easier tuned out with a carb. I thought about doing a little more tweaking, but since it’s running well with no stumble I’ll probably just leave it. What’s wrong, is my pump going bad? You may be experiencing EFI vapor lock. 5:1 (seems to be running better but still not its best), do I have to plug a lap top in to be able to lower them more or is it just not going to work on E85 its running great and all but there are some things which are not plug and play. My engine is running to lean, or is backfiring on acceleration. everything was good and all of a sudden it just started surging at idle 300 to 1200 rpm. Disable any sub-system you can work on ONE ASPECT only. 9 AFR, then recover with the correct AFR and runs great that point). I just drove from San Francisco to Reno, NV and back. I am running a terminator stealth, and was running a pertronix dizzy, on a 351 cleveland that was originally points, had nothing but problems with dizz so bought a dual sync, no have no way to hook up coil, I do not want a msd box as I really dont have anywhere to put it, and trying to keep the classic clean look under the hood. I want to use the fitech throttle body instead of the stock tbi so I don't have to worry about the chip nonsense. Exhaust length and O2 placement has an effect on this as well. 0:1 that went lean at about 13. 6:1 but it's hard to believe since if I rev it it blows black smoke out and actually crests creates spots of black on the floor. The Game Changer has arrived from FiTech with its latest addition to the line of Go EFI Throttle Body EFI systems. However, when an overall body strength measurement is required, many doctors and exercise physiologists still regard the Grip Strength Test – widely used since the Step 1 - There are several combinations of misfire conditions, steady or random, at idle or under power, which may or may not be detected by the computer and trigger a check engine or service engine soon light, read trouble codes to help pinpoint the cylinder(s) in question and follow the repair guide below. Between a 3 to 8% TPS reading it leans out real bad when transitioning to cruise. I suggest you turn on the data logging and make a few runs that will cause the issue and see what the data tells you. From FiTech Owners Facebook Group It is generally accepted that the default Prime Shot value (258) is way too high. This kept it running smooth down here at sea level. If your car is running an aftermarket EFI system, the LM-2 can send it’s information to that computer in order for it to make it’s fuel adjustments. FiTech Fuel Injection TM Instruction Manual for the following Go EFI Systems 30001, 30002, 30004, 30012, 30061, 30062 & 30064 This Quick Start Manual is designed to get you up and running with the Go EFI System Base Kit and either the 40003 Fuel Command Center or the 40005 Inline Fuel Delivery Kit. No problems. The FiTech Go EFI System is the Apr 14, 2019 · Lean conditions can be caused by too little fuel and/or too much air. In this instance, we would recommend an aftermarket throttle body injection kit such as the Fitech units we offer. 4. My engine takes longer to start than I think it should. The most important thing to remember with EFI is to tune ONE THING AT A TIME. Strength Assessments . At WOT, the engine was actually a bit lean. It will stay lean for about 1 to 2 seconds (15. I'll be using it to control a nitrous system. There are quite a few threads on the forum about FI. I started with a 160 milodon high flow stat and in the summertime here in georgia on the highway I an around 170, when idle it goes to close 200f. After installing the FITech we got it running but started hard and would not idle smooth at all, after checking the install again, everything seemed to be in order. You can start by checking for voltage at the injector. The Bad part is it would just shut off at under high RPM's and lean the motor out at wide open throttle. Not too hard to do, just a little lathe work. You should be able to data log the pass and go back and view the fuel pressures, I bet it drops off which is why its going lean. As expected, the company made a dramatic impact in the market and have continued operating at a torrid pace to keep up with the demand. I have installed the Fitech on a SBC in a 71' C10. 7:1 for gasoline, and you’re good to go. 55:1 gears in the 12-bolt. I used to run an 850 Holley. This has to do with exhaust reversion and the amount of fuel that goes un-burned when both valves are open. I am on my third try to switching over to E85 using my FITECH 1200 PA on a SBM with a D1SC procharger (I know, but there seems to be way more tuning gurus here than the supercharger forums lol) and I am once again running into the same problem and nobody seems to know why. There will be another post about installation and running in the near future. Pishta, Your question was. I know nothing of carbs and know that when I got it from the PO it was set to idle very high. This is critical, because any air leaks will give a false lean signal and thus richen the AFR more than it needs to be. Mar 11, 2016 · Our initial run prior to installing the FiTech EFI system showed us a very fat fuel curve. The Fuel Trim will increase or decrease the injected pulse width in response to the sensed AFR – if it senses too rich, it will reduce the fuel, and if too lean, increase the fuel. Engines don’t like to idle lean; a lean air/fuel ratio is one of the biggest causes of a surging idle. it has been about 0*f for the last couple days and thought I would share with the forum, i am testing a throttle body fuel injection system in my 400 this weekend. I just needed the distributor and coil. 0 volts. I did a little pull and then look down to see the car running full lean. I personally know at least one guy running FiTech and loving it. This will help relieve the burden from banks significantly. A pro checks the tail pipe emissions and sees a hot motor running rich, he then connects the scan tool, to see if ECU, sees this rich or is causing it and why. Oct 02, 2013 · i really don't know if it is a mopar compatibility issue or a fitech issue. The engine runs beautifully, with perfect idle at 650 RPM, but every now and then I hear the IAC give a sort of "snap" and the idle is at 1200 RPM. >For those of you running the FiTEch Injection, I have a couple questions >> How do you like it? Works as advertised. To measure strength comprehensively a whole battery of tests would be needed which in the context of most health and fitness assessments is not feasible. David Mar 11, 2016 · This is then interpreted that the engine is running too lean and needs more fuel. The system sees this as a constant lean condition and will keep adding fuel. It seems I had one of those Command Centers with a bad check valve. Either way after it quits running rough I can hear the IAC valve hissing like hell and if i put it in drive while its hissing it will try to lunge forward. So I disabled closed loop and drove home but the O2 sensor read 35. On an engine with sequential injection, this is simple enough – get the engine idling at 14. I installed Holley Sniper on three other Mavericks here in Brazil and the problem also exists. The stock tables in the OE calibration are mapped for a cam that will produce lots of vacuum at idle speeds of 550-700 RPM. FiTech EFI Tuning Forum. When the engine is started for the first time at any given day the fuel rail which is part of the fuel injection system is pressurized by the fuel pump, under command of the engine management system to the operating pressure of the fuel injection system. However, running too lean a cruise mixture will cause the cat converter to overheat. 8:1 as the throttle opened up in mild acceleration. If I was to do it again I would consider the Sniper. The high speed lean-out is caused by a similar, but different, vaporization problem. 19 Jan 2017 That's when I decided to give a Fitech 600 a try with the rear mounted electric pump. We installed the 2. I am just running a DS-II. I have 1970 model 350 bored . On the more expensive units you can lock out the dizzy. The thing that will generally make an idle hunt is fuel maps - as idle goes "rumpity rump" the vacuum signal changes, and you can very easily jump from a cell that's ok to one that's super rich or lean. he had to lean the carburetor by several jet I bet your running out of fuel by the end of your pass. The FiTech is pretty much the same thing as the Holley Sniper. Jul 09, 2010 · Running the car down the highway will heat soak the cat, to ensure it will “lite off” during testing. 3. Enrich the mixture, lose horsepower, gain Probably 350 horsepower plus some nitrous. 5 Mar 2019 Get rid of the rich spot I get (mostly comes after a momentary lean spot) 2. Most issues are user based, and not hardware based. The AFR on the hand held says it's about 13. It will shut down the nitrous if it gets too lean. But an engine like this, it runs at tracks like Daytona where you have long periods of extended running at very high speeds, both vehicle speed and engine speed, so you can't afford to run this engine lean. This does not necessarily mean the engine is running too lean. Being in Alaska we have no tuners so the self learning system was a no brainer for me. In idle still goes to 190. that lean running and even detonation are not problems at part throttle. Have tried fresh plugs? Anybody tried running a carb’d fox, 85 and earlier, through a smog check with a FiTech efi setup to see if they catch it? There’s a unit that looks a lot like a carb, and Holley makes a similar product as well. 2 volts almost instantly. more lean the mixture, the lower the number the more rich the mixture is), but  I should note that although I found a lot of helpful FiTech info on here and the Thanks,I will bookmark this in case I run into this problem. A smaller decay will extend the time Whay are you guys running such a rich Idle at 13. They think its getting too much fuel and the system overcorrects. FiTech Electronic Fuel Injection This one’s going to be more of an opinion post than a project, as we haven’t installed our Fitech yet. For someone running without the FCC this doesn't apply as the 43 psi throttle body regulator will function as designed because of the return from throttle body being hooked up. I don't understand how you can create a 100% leak free system using big band clamps. And that knocking you hear under your hood when it runs "lean?" Think of it as a ticking timer, counting down the bomb's final moments. This way the fuel trim wont be compensating for the increased pressure. If it surges ahead your Lean 2. 35. You will need to know if it is ignition related or mechanical, typically a black plug is ignition fouled. A lean mixture gives a voltage of 0. I am running fitech, 180 thermostat and my settings are 185 to 175. The clamp on O2 sensor bung is a fail. Was wondering if anyone has used the fitech efi kits for there foxbody as I just picked up a 85 4 eye I'm fixing up . Find FiTech Go Street EFI 400 HP Self-Tuning Fuel Injection Systems 30003 and get Free Shipping on Orders Over $99 at Summit Racing! EFI conversions made easy--FiTech Go Street EFI 400 hp systems are true carburetor replacements. 5? Would it not be better to run a slight lean idle like 15:1? curious. Route and connect the brown tach output wire to your tach if you have one. It runs great, I'm very happy. This will not work that great with the FItech as it is so low of a rpm that it thinks it's the starter cranking the engine over and does certain things until it's at running rpm's. One of the reasons I did not go with FiTech was that I couldn't tell how much control you had of these parameters. If engines are run even leaner beyond that point, the engine may be showing signs of running cooler because of inadequate fuel burning with all of the excessive air going through the engine. We still used FiTechs fuel sump, liked it better than edelbrock since its all metal and edelbrocks was plastic, but we have had problems with the float and pretty much using the vent line as a return after welding in a bung in the filler neck. First let me say I'm not a fan of the command center. Thus, you can have 1 cylinder that is over-rich for one reason and another cylinder that is over-lean for another reason! 3) White Fitech wire plugged into the tan Electric Choke wire (12V when on, but drops to 10V when cranking) I think this may be the problem, but not sure where else to get the constant 12V from. I can set the activation and deactivating rpm levels. You can share the log with FiTech and see what they suggest. yeah, the original Edelbrock E Street is down to 1408 from Pep Boys on Amazon. No issues at all with the fuel pump. well I don't know much of that particular unit I am running the hyper fuel from fitech and the dual power adder 1200 hp system the hyper fuel is very similar to that one and I run 1 7 psi electric pump at my fuel cell to a series of 30 and 10 micron billet filters the to the hyper fuel, the electric pump does in fact keep the reservoir full in This causes the Air / Fuel mixture at the nozzles to go lean. Get rid of the Austin, who runs the site is usually quick to answer. Tuning idle by O2 can be tricky if you have a big cam. When the ECU is unable to determine what the FiTech Fuel Injection TM Instruction Manual for the following Go EFI Systems 30001, 30002, 30004, 30012, 30061, 30062 & 30064 This Quick Start Manual is designed to get you up and running with the Go EFI System Base Kit and either the 40003 Fuel Command Center or the 40005 Inline Fuel De - livery Kit. The Innovate meter reported an idle mixture of around 12. I am getting a sag when I accelerate. Relocating the FCC (running all high pressure hosing) and welding the bung are all actual work :v . The ecu with a narrowband o2 sensor, when in closed loop mode, will then lean on the fuel map if it is receiving a rich signal from the o2 sensor till its stoic. This must have power when cranking and with the engine running. Not as pronounced on the fitech afr reading. Half throttle is better than full throttle used to be. My physical stumble is gone, car runs great, but I still have a bit of a swing from rich to lean on mid rpm tip in on the afr gauge. If it stumbles and recovers your Rich An engine running too lean will often have excessive HC due to what is called a "lean misfire". They solve it by adjusting the throttle blades on the throttle body. I guess the FiTech "Fuel Commander" system is an option also, but I have not experience with it. I have the fitech fuel filter and fuel line to go the length of the truck if I ever decide to abandon the factory lines and filter. Dec 21, 2016 · All Fitech EFI systems have learning procedures that the system uses to adjust the active fuel tables it is using for operation. Since my car is 99% track only car I want to know if the Meanstreet 800 is a viable racing setup. Jul 02, 2015 · The problem I'm having is a off-idle/tip in lean out. In effect, that status makes the engine perform with less gasoline than it needs to operate properly, and it increase the amount of friction between the engine's moving parts. I have reset all fuel learn values and checked the timing and do not have a vaccum leak. >> How long have you had it? Only have about 500 miles on it. I'm on my 3rd summer running a FiTech Go4 600 on my 73 Eldo. If I had to do it all again I'd drop the tank and put an in tank pump. The same thing occurs at steady-state highway cruise; the mixture is lean, takes longer to burn, the load on the engine is low, the manifold vacuum is high, so the vacuum advance is again deployed, and if you had a timing light set up so you could see the balancer as you were going down the highway, you'd see about 50 degrees advance (10 If the ignition components and compression in a misfiring cylinder are fine, that leaves a fuel-related problem as the only other possibility. < Back to Testing Protocols TOC . Oct 02, 2019 · I suspect it is a lean condition in my case (and probably yours) given my heads and cam. Oct 13, 2019 · If you have noticed that your vehicle is running irregularly or that the engine sounds rough, there might be a problem with your oxygen sensor. I would really like to be able to dial in the fuel map via computer EFI software, but I don't see this feature supported in any of the literature. On early ‘Wings, each cylinder is individually carbureted. 5, yet the AFR Trim % stays at 0. A good old fashioned top end de-carb is always a good idea before emission testing a vehicle. 060 over I want to put in my truck and use the 4l60e transmission. 1. The fuel pump is not coming on when I first turn the key on. Feb 03, 2016 · Can anyone help me out. Advanced Tips for EFI Tuning with Fuel Pressure. -----85-0001 Saleen Mustang When its time to install a higher HP set up TT632 I will go with a different EFI configuration. I do not seem to have as much power as I should. There are a number of tuning adjustments that can play a part. Use an in-tank pump. The FI performed great. 4) Fitech reset to default settings to rid it of possible incorrect learning Yep, back in my drag racing days, we always said, "lean is fast. On the smaller FiTech you can not do timing control. Oct 02, 2019 · Share those logs with FiTech and also any online communities specific to FiTech. Upgrading to Gen III LS-Series PCM: Sensors and Inputs Guide includes instructional photos, checklists, and step-by-step instructions on upgrading to the GM Gen III LS-Series PCM, ECM, Electronics, and POWERTRAIN CONTROL SYSTEMS Running lean (bottom line above) also creates problems with knocking and overheating plus potential damage to the pistons, valves and exhaust manifolds. If, as may be the case with your car, you either have an engine misfire or – more likely – a leak in the exhaust system, this higher oxygen content in the exhaust will quickly fool the WBOS into reporting to the ECU that the engine is running lean. The cooler you keep the engine the better you can stave off detonation. The Duraspark was in the car from the factory, so, kind of a no-brainer for me. It ran great but always was rich. The fitech fuel pump is 340 lph by the way. Had variable weather conditions last week with different temperatures and humidity levels and the FiTech system is running great. Going from a 650 cfm carb to the FiTech 835 cfm throttle body has just made 46 year old motor rip. A true Port Injection EFI with faster EMS system. May need a larger mechanical pump. John I also have a 302 with Ford racing heads and the same Edelbrock rpm air intake however the cam is unknown. AND SHARE it In combustion engines, "running lean" goes beyond using gas efficiently. Ran too rich which probably cut down on power a little bit, but I believe that was because the O2 sensor was too close to the exhaust exit. 29 Aug 2016 Whay are you guys running such a rich Idle at 13. The graph below taken from the Tech Edge web site shows the output more clearly. Accel Decay 20F = A larger decay will shorten the amount of time that the injectors are adding fuel during a transient. I have an external fuel pump. it seems like it would go lean and hurt/melt parts on your engine you should have a much larger rated fitech unit or be running very low Find FiTech Go EFI 4 Power Adder 600 HP Self-Tuning Fuel Injection Systems 30004 and get Free Shipping on Orders Over $99 at Summit Racing! If you're running a supercharger, blower, or nitrous, and want to ditch the carburetor, you'll need FiTech Go EFI 4 Power Adder 600 hp self-tuning fuel injection systems. Also has a programmable rev limiter FiTech already has a lower cost option for engines that wont see over 400 hp. it was running ok but has been hard to start when cold but this saturday that just passed it was running very lean on and off to the point it was barely running so i am pretty sure the issue is with the fitech but it has been too cold out to even try messing with it. Each of these improve efficiency, longevity, and overall engine performance. Not running in the car yet, but it ran well on the dyno with timing control. Engine is a 30-over 454, mild cam, oval port heads, edelbrock performer-rpm with a Q-jet jetted out to 502 specs. It only comes back to normal if I turn the engine off and on again. There is chart floating around with what an engine with 11:1 compression (me) and what the fuel needs are for a motor making that without detonation with certain gasoline octanes. I can't find any vacuum or exhaust leaks Dec 23, 2016 · Defective WBO2 sensor, WBO2 sensor wiring, or an exhaust leak upstream of the WBO2 sensor. When the mixture in your car (oxygen and fuel) is too lean or too rich, the engine becomes less efficient. Below 1k HP I think this FiTech system is good to go. The AFR will be displayed at all times so you can see if you're going rich or lean on acceleration then you'll know exactly what to adjust and by how much. If at any point the ECU indicates more than 90 percent duty cycle, you know that your engine needs more fuel to supply the commanded AFR. Try decreasing the cranking fuel to lean out the cranking AFR at the warmer  The high pressure line supplied by FiTech runs from the FCC to the remove the FiTech throttle body, bolt the QJet (stored in the pod on top) back on, remove . Another imperative aspect is the merchant services provider will know whether the merchant runs on high speed Internet or dial-up. Apr 03, 2010 · Here's a simple and quick way to test if you are running Lean or Rich at Just about any Throttle position,WOT, Low Speed, Mid Range etc. I have to dive under it periodically right now to check on the fuel filters anyway. Converted from fitech to Holley sniper , 55 wheel horse gain simply due to the fact that the sniper is tunable 420 HP 409 Ft. I would say try to diagnose it from the rich 2 first. I can wait it out or floor it and it will stop. I running my 302 swapped '80 Fairmont with the Fitech 400hp and DSII. Vanagons are very susceptible to the "lean misfire". The 500 & 600-cfm carbs can be modified to avoid an off-idle lean condition, so they can work well on a low boost pressure single or dual carburetor set-up, but we avoid the 750 and 800 cfm AFB s on street driven blown engines because of a lean at part throttle problem that is inherent with this type of carburetor. I just have a xe256 cam, headers, fitech and aluminum intake. The unit is capable of changing ignition timing during cold start and running based on engine response. at 100% throttle, AFR Target is 12. Fuel System A malfunctioning fuel system can reduce the amount of fuel coming into the engine, causing a run lean condition. Jun 13, 2011 · EZ-EFI Running really rich. Again just my personal opinion. Rigs that have larger overlap cams will not work well or at all with self tune algorithm. 5:1 can be used, normally at the standard light-load ignition advance. 2 – 0. 6, HOW DO I ADJUST IT TO RUN  22 Oct 2016 When the vehicle is running go onto the dashboard screen and . Just search the forum for each of them, a lot of discussions about fuel pumps and tank modifications, too. , but if I try to get into the secondaries, I get a lean pop through the carb and it bogs badly - obviously running out of fuel. I decided to run down and fill the tank for a test drive. Your engine's air-fuel ratio is a perfect example of carefully controlled balance; just a bit too much -- or too little -- of either air or fuel can turn your powerhouse into a time bomb. Defective Engine Coolant Temperature (ECT) Sensor - Low engine temperature requires more fuel. They also had issues with poor quality fuel lines with the kit and with all the different problems we see posted all too many people won't even post about theirs. To avoid that scenario, I slowly increased the lean-ness of the incoming charge until the engine just started to react negatively, and then backed off. 7. The defective WBO2 sensor or exhaust leak causes the WBO2 sensor to transmit a lean signal to the ECU, and the ECU therefore continues to enrich the AFR (trying to achieve the Target A/F Ratio via Closed Loop Compensation). The Fuel Trim acts extremely quickly. My engine is running rich. >> How long did it take to "learn"? Poor thing was very confused for the first couple miles. I will need to run a 7/8 square to spread adapter. Fitech purchased already and been on the FB page. The FiTech is the same as the Sniper. In addition to less efficient operation with either a carburetor or EFI at altitude, the carbureted engine looses suffers a further loss of efficiency by not burning all the fuel that my lead May 23, 2006 · A vacuum advance should be tuned in a running engine while you're setting timing. However MSD doesn't make one for the slant 6. Below is my eventual root cause fix, in addition to new RPM-specific accel pump adjustment from the newest T198 software rev. Connect the points white wire from the seven pin connector to the coil driver. I would really like to get that to work before I really start to lean on it at WOT. I personally love my fitech it's amazing, but with all the risk running the command center I just didn't want to risk it. I bought the fitech 600 power adder. Running lean. Connect the battery positive of the coil driver and the coil to switched power. Having said that, my biggest issue with it has been starting. 19 Aug 2016 if it senses too rich, it will reduce the fuel, and if too lean, increase the fuel. Hey guys, I was just driving my car around, everything was running great. I have beat into the GROUND the importance of buying the correct billet distributor, and phasing the rotor, and the other minor accommodations that go into setting one of Aug 25, 2015 · FiTech Go EFI 4 installed in a 1981 (to 1978 conversion) Trans Am was a success. com, the official website for Hot Rod Magazine. Will just tighten it a notch each time! peter Says: July 4th, 2017 at 18:05. A clogged fuel filter can reduce both fuel delivery and fuel pressure. I have tried every setting I can to get it to fire right up and run good right after start up. Congratulations to ThirdGen. It features the fastest, most accurate self learning available, timing control and wet flow annular discharge. Pishta, Your question was Oct 07, 2018 · When I shift into gear from park to drive or drive to park, seconds later, I will have this same lean spike and the engine almost dies. This Startup Tuning method completely disables the Prime Shot and relies on Cranking Fuel and Afterstart Fuel to start the engine. The engine is a 468ci big-block with a mild hydraulic roller cam, a TH400, a warmed-over converter, and 3. Mar 22, 2017 · 3. The "rumpity rump" is a misfire, and misfires will read lean on an O2 gauge. It is written specifically for MegaSquirt ® or MegaSquirt-II™ EFI users who are new to tuning engine with a programmable controller, and tries to make very few assumptions about what you already know. When you notice a Stumble, Back off the throttle a little 1/8-1/4: 1. Avoid having to buy additional software programs, learning how to think in computer code, or relying on a questionable 3rd party tuner. ) After 30 minutes or so of driving, fuel pressure starts to fall, then the fuel pump gets louder and/or seems to quit running altogether. It may not be lean enough for your seat-of-the-pants gauge to detect, but I can certainly see it going lean using the dynamometer control panel instrumentation. So, it is imperative to verify both fuel and air circuits (including emulsion tubes). Dec 29, 2019 · FiTech is plug and play with a MSD Distributor. I've got a bit to learn but it's really simple and it runs out great. for example, i am fighting a lean tip in which wont change with any kind of accelerator pump change. It’s also an example of a company working in a highly regulated industry that’s busted free from the old stone age mentality (a little inspiration for those of you wanting to get the hell away from May 03, 2018 · Second opinion] I have a FITECH 30001 on a 327 350hp L79 engine with a tanksinc 255 pump in tank. Nov 26, 2017 · I like the idea of having Fitech control both fuel and ignition timing (plan to get the Go EFI 4 600 HP version). I just put my FiTech back on my Nova Monday night. I'm ready to buy a TBI system and there are a couple features I'm not sure the Sniper EFI supports. Mar 23, 2016 · It's Saturday so FiTech's tech department isn't in. The carb shouldn't lean out 6 and be rich in 2. I would say getting some airflow via running the engine higher rpm with trans in neutral has cooled it back down. Cooler fall temps made my temp go down to 155 when driving. The is an introduction to tuning with a programmable electronic fuel injection ECU. 24-25. First I had a mechanical pump with my Holley carb. Waiting for response from tech on this one. Jul 05, 2017 · Fitech just came out with a new G Surge module that does not have a float. 8 volts to 0. The weeks following the install saw me slowly increase the air/fuel ratio numbers to lean the system. Artivest is one of the exciting New York City-based startups we’ll be visiting as part of our Lean Startup Labs Enterprise Summit Feb. I know it’s not kosher, but probably cleaner emission wise than any carb ever made. I have read lots of love hate with the FITECH but for the price I don't think you can beat them. I had everything working great with no throttle lag or lean AFR. Next problem is getting the logging feature to work. Lean the mixture and gain horsepower along with cleaner emissions. Oct 19, 2017 · Our engines idle at 480 rpm's. Mar 11, 2016 · FiTech wants its potential customers to know that they have done all of the hard work for you, and that you don’t even need to own a computer, let alone a laptop, to convert to a FiTech EFI system. Most often a faulty TPS will cause high CO, as an engine's ECU always prefers to send more fuel rather then less, in an effort to avoid a lean fuel mixture and subsequently higher engine temperatures. Trying to make a long story short- Tip in still seems a bit lean, but adjusting the numbers as recommended on FItech's web site moves in the right direction. I haven't finished my motor yet but can't wait to try it out. I hear FiTech's Go EFI-4 600 HP Throttle Body System is rated at 600 HP, but is suitable for 250 HP through 600 HP engines, making this system perfect for everyday driving, weekend street machines or bracket racing applications. so the computer thinks its lean and is adding fuel I just don't know where to go from here. Jun 09, 2017 · I recently bought a FiTech Go EFI fuel injection system for my big-block Chevelle. Grip Strength . Or if you pick up the Innovate XC-16 gauge, you can have a single gauge to watch your air/fuel. 8. Back after changes. GoStreet EFI Master Kit with Fuel Command Center by FiTech®. The opposite would be true if the sensor was telling the ECU that it was currently running lean, it would richen the fuel map till the o2 sensor was reading stoic. There is a setting in the hand held, that will let you slow the pump with PWM at low rpm so it can run cooler. " True as that may be, burnt Pistons were a common occurrence. Just finished, and it's not firing/starting. It'd be nice not to have to worry about whether or not you are too rich/lean etc and just be able to focus on the chassis. If you can get a full injector purge, that is best. Here is the history of what fuel delivery I've used. Jan 24, 2017 · All Fitech EFI systems have learning procedures that the system uses to adjust the active fuel tables it is using for operation. This operating pressure is maintained throughout the driving or running period. Lets start with the guy who has rebuilt his motor or has a strong running engine, but would really prefer to have EFI (electronic fuel injection) and is looking for the easiest way to achieve this. 6, Then it tried to start tuning off this AFR and gurgling etc. Nothing better then full control over everything plus running flex fuel on big power, with a ton a failsafes. About 500 miles round trip. When in park it will sometimes start sputtering and if i give it gas it will backfire through the throttle body. If the engine can run fine, but only if you pedal it to keep it running, you can breathe a sigh of relief 'cause you're in the home stretch. If a merchant is running on dial-up Internet, this could greatly affect the transaction time for consumers when making a purchase with EMV software. I'm probably calling FiTech today. A good injector should also buzz while the engine is running. Andrew Mar 17, 2017 · We check out FiTech’s new fuel-injection system and put it up against a carburetor in a heads-up EFI dyno test on a mild junkyard LS engine. I know there is a big one on Facebook but I'm not a FB kind of guy so never went there. Dec 13, 2016 · Fitech 1200hp System. Mar 12, 2017 · The instructions from fitech are to swap the regulators so the 43 psi is in the FCC center. This allows it to return fuel to the tank at all times to cool the pump better. I believe all the systems have their pluses and minuses, I really do hate the FITECH hand held but for the price i'm willing to deal with it. hotrod. And thinking about going this route instead of carb as i plan on street driving and running some at the track thanks With the FiTech you need to run a hotter thermostat (I believe 190F vs used to run a 170) so I've noticed on the trail that things get hot quicker as the temp is already closer to the uncomfortable zone. The problem was finally found by using a pressure gauge which would show pressure dropping to zero, the motor running like crap. fitech running lean