Howell Engine Developments, Inc. 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. when i turned the key for the first time it ran rough like a cold carb ( i was pissed) then we finally got it to idle and let it idle for 30min went for a quick drive 5 min ( snow here so we were limited ) as i drove it watching the fitech screen gas levels. I might add that hesitation and poor running on a cold or cool-ish engine can be caused by a coolant temp sensor that is "skewed hot", telling the ECU that the engine is warmed up when, in fact, it is not. Fuel injection is quiet popular theese days. The local Polaris dealer said the TPS (Throttle Position Sensor) needs replaced. C10 Nation Day from 11-Noon. the original 350 was built with the following: eagle high performace rods hi performance pistons chrome moly. denna grupp hanterar fitech efi med dess användare, nyheter och supportfrågor. yesterday, the car would start but not keep running. Then Friday night as I was driving home, the car started acting up. My cousin has a '07 Polaris 700 EFI with just over 2500 miles on it. i have a question about a 1813 thunder series avs carb i purchased in 2007. Jan 03, 2011 · Sounds like the Magneti Marelli EFI gremlins have arrivedFast idle starts. This has been an ongoing problem. Re: why do some carbureted engines run rough when they're cold The newer EFI controlled engines, in whatever, can adjust the air/fuel mixture faster than we could ever had imagined just a few years ago. Within about 50 miles of home topped off (half tank) with 89 octane to see if it would help. I plan to turbo the truck in the future but want to run what I have. And it would not start , so took the timing control part off line and tried again with distributor hooked up direct to msd box , now has spark and runs (very crappy though probably due to fixed timing at 14 degrees) so it looks like it is a case of distributor sending signal to. Sep 03, 2010 · The DTC codes indicate the following P0261 Front Injector Open/Low EFI P0263 Rear Injector Open/Low EFI So my first question, notice anything odd at startup or running regarding fuelingmaybe check the wiring routing up to the injectors for pinched wires and inspect connector contacts for symmetry and such. When it is running bad it is running VERY rich (that is why its running rough I think) but I can't figure out why its running rich. Fired it up and found I had 22hg+ of vacuum at 800rpm when warm so I set the cam to 1 and the warm idle at 730 rpm and tried again. Lots of cranking to get it fired. It took some time to adjust the efi to an engine half the size it was designed to support. Sep 19, 2017 · In the old days, big-inch Hemis with dual carbs were notoriously finicky when it came to getting them to run smoothly on the street, but that’s no longer an issue with RFI systems like this one. These pumps do normally run at MPFI pressures, but so far the one in the Camaro feeds two 350TBIs just fine at 13psi. Re: idle surge, running rough, guzzling gas - 88 Ranger. Dunlop Introduces New. The products featured in this review are the FiTech 30002 Fuel Injection System and the FiTech EFI 40003 Fuel Command Center system. Nov 10, 2017 · FiTech Install 1972 Oldsmobile Cutlass Supreme This article walks you through some pointers for installing a TBI fuel injection system in a classic carbureted engine. Greetings! It looks like I am about to go down the TBI swap road. If noise continues, run engine at mid throttle for 20 minutes. Fitech Injector Stuck Open. my briggs mower won't idle for the first 10-15 seconds. Re: stumbles on acceleration, WHEN COLD, idles fine, usually Okay, the rotor does not return easily, so I'm going to look into that. Can be adjusted for cold or hot start issues. Oct 02, 2014 · Motocross EFI Tuning Essentials - Dr. SOURCE: 2001 ford 4. Comprehensive variety of chevrolet gmc and much more. -Can be remapped for future modifications Take a minute and check out the review from ATV television. I have an 88' F-150 with a 5. i have a question about a 1813 thunder series avs carb i purchased in 2007. 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. Sometimes the machine did not want to idle at all. Over at Chevelle. Edelbrock is the most respected name in performance! Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance. But just for those of you having idle problems on a cold start, check your timing first. It's did great until today. With the old carb, the engine would get up to about 215 degrees, then start running rough, so I'd be forced to shut it down and wait for it to cool off. when i turned the key for the first time it ran rough like a cold carb ( i was pissed) then we finally got it to idle and let it idle for 30min went for a quick drive 5 min ( snow here so we were limited ) as i drove it watching the fitech screen gas levels. As with the previous systems, the EasyStreet system is self-tuning and requires very little input to get up and running. Usually when the engine is cold it will sound like its running on 1 cylinder right when I start it. 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 N/A Applications - For cruise and idle situations a value of 14. I ran it with a blow through carb 1st and then the fitech 1200hp unit. From EFI to Carburetor Upgrade Instructions. The ignition noise fault was caused by connecting Fitech’s signal wire to the coil negative, even though this is what the instructions said to do. Got the valve covers apart and trying to figure out no start hot starts. Very happy with the product. I took it back to my mechanic. Changed the startup and crank values way too much to have the same poor start up no matter if its cold or warm. For what it's worth, I can't stand the way my car runs with the Edelbrock carb during cold start and warm up. I find it hard to believe I have a stator or switch box issue. Does anyone out there have any thoughts. I plan to turbo the truck in the future but want to run what I have. Jun 13, 2011 · EZ-EFI Running really rich. Access the oil dipstick and fill tube from the left side of the ATV. Hope this helps. You will not get a huge improvement power wise but probably the fuel consumption will be lower. Q: The car runs fine at start up but after 20 0r 30 miles, rough idling start occurring at stop lights. Rough idling backfiring hard starting when cold cutting out when throttling up dying after a hard run POOR gas mileage It started this Spring with the symptoms above. 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. Nov 10, 2017 · FiTech Install 1972 Oldsmobile Cutlass Supreme This article walks you through some pointers for installing a TBI fuel injection system in a classic carbureted engine. 2 MPI Horn Output Possible Cause Corrective Action Engine Usage Available For Consumer Key on, beep for 2 seconds, then off. It is a cold november morning. Its gonna need at least a vented cap to regulate vacuum and weather (hot cold) fuel volume and expansion. Aug 20, 2019 · To achieve our goal of cold-start friendliness, fuel economy, and performance, a FiTech Go Port EFI was used. If you try over. Affordable aftermarket fuel injection is here and it couldn't be any easier to install on your vehicle. 9 hotwire FI-system without the cold start injector. In a carb app it's there to keep the carb from freezing on cold days, which i don't know if it applies to the high pressure efi or not. It ran great but always was rich. Band O2 sensor from your Electronic Fuel Injection. I have it on about a month. It only comes back to normal if I turn the engine off and on again. I turn it off, take off the seat and rotate/apply pressure to the spark plug wires where they meet the plug. Nov 29, 2019 · I haven't so much as lifted a valve cover on my I haven't so much as lifted a valve cover on my 454 in probably 15+ years now. The throttle bodies are too large so vacuum goes to zero at about 60% opening. The power control module or PCM now determines the speed at which an engine idles, based on several input-sensors. EFI should allow for a true performance comparison I would think. when i turned the key for the first time it ran rough like a cold carb ( i was pissed) then we finally got it to idle and let it idle for 30min went for a quick drive 5 min ( snow here so we were limited ) as i drove it watching the fitech screen gas levels. Runs great with just a holley 600. Always fixes it but can be annoying. My sons 570 is getting harder and harder to start when cold. Wondering if this is effecting the system learning or if his coolant sensor is reading wrong. EZ EFI idling high, IAC sucking air The only way I can get it to run with the throttle blades slightly open is to put my finger over the iac hole and stop the air. You buy gel cell batteries that do not outgas and you put them on something just above the floor so they are not subject to cold from concrete. 0 EFI to his big-block Camaro and while it runs great, it has definitely lost much of its old rumpy cam idle characteristics. I can check the ECU and repair it. Under a load on a hill it feels like I am loosing one or two cylinders. I have it on about a month. I understand why. Putting it after the fuel rail means all fuel must run through the fuel rail, and over the injector inlet, at all times. The quick-start guide is all that I used initially, but it also comes with a complete, detailed user manual. org members. I have removed the carb again and cleaned the needle valve out and the whole of the carb just in case there where any dirt behind it. Any ideas on how to get a better warm idle. Anyway My car has been running nice and strong for a long while now and the engine is still nice and smooth with very little comp. comparing it to a fully tuned race carb is not apples to apples but we had to see what it will make. I called Fitech - they said to make sure the white wire had 10. Dont mean to hijack this thread but I need any and all the help I can. Put an end to cold start issues, hesitations, vapor lock, and flooding. While underway you could not ask for a better running motor but while idleling it seems as though it is not running on all cylinders. Rough idle on cold start ups Ok when I first start the G8 in the morning the rpms are all over the place. It is a cold november morning. Change the fuel pump in the fuel regulator, while I was there I change the oil in plugs, replace the air filter, replaced the. The problem is most likely a failed integrated circuit in the ECU, which causes the injectors to run maximum open time (50%). Everything went really well with no problems. I am going to take off the timing belt and put it on the right way soon. It will start, run about 2 seconds, then dies. It started running fine when cold but after it warms up it starts to run rough, lose power, and runs REAL rich. The FITech came loaded with a base cal for a moderate 350 and consequently seemed to learn a bit more quickly. Is a safety feature if it detects high temperature in water above 200 F or low oil pressure. Jan 03, 2011 · Sounds like the Magneti Marelli EFI gremlins have arrivedFast idle starts. Running rich is almost never caused by the temp sensors, which only cause enrichment when cold. Pace Chevy 350 300HP EFI Engine with TH350 Trans Combo Package Pace Chevy 350 300HP EFI Engine with Tremec TKO-600 5 Speed Trans Combo Package Pace Fully Assembled "Brand New" 350CID 300HP. I have a 91 GMC Jimmy which idles horribly (and it has even stalled) when it is cold outside (17* C or less) and it is the first start of the day. Customer support horror stories have ruined FiTech's reputation IMHO. Featuring advanced EFI system, this engine assures improved fuel efficiency, better driving control and easy cold start. Maybe 500 miles. The engine is a 385 stroker, 10. Re: stumbles on acceleration, WHEN COLD, idles fine, usually Okay, the rotor does not return easily, so I'm going to look into that. Ok I have had the fan blade problem and had the updated gears installed for the reverse and now this problem 2010 Polaris Ranger 800 XP "60 HOURS ON IT". Rockers are loose on some of the valves. I've changed the plug wires this week, running them on the outsides of the valve covers and behind the heads. The engine is currently mounted to one of our Custom Motor Mission Machine & Radiator engine run stands!. He has a 01 or an 02 zr 600 batteryless efi. I haven't torn apart the distrib because I'm swapping out the front shocks and replacing a torn CV boot. Almost zero vibration in the engine and overall I was excited to get started with this EFI system. After i had run it for a few hours i started to have problems with the idle. At highway speeds (65 MPH) rpms drop quickly and truck slows. Apr 24, 2013 · Re: Rough running 89 K1500 4. Off idle and during acceleration it runs fine. It will start, run about 2 seconds, then dies. May 30, 2017 · Intake manifolds are going to get wet with fuel while running. cold-start is not. Ask Away: How Electronic Fuel Injection (EFI) Affects Cam Idle (Hint: You May Not Like It) Posted by Jeff Smith on May 1, 2015 at 10:00 am A friend of mine just added an EZ-EFI 2. Okay, I have an '07 Ranger 700 in my shop with a rough idle and often dies out within 2 minutes of idling. If you don't carry out reset adaption after a new tune is downloaded to the ECM, your engine may be rough at idle and at low throttle, low revs running. i installed my efi system yesterday 2 of us took us 4 hours with running the over flow/vent line back to gas tank and changing fuel pump. It's did great until today. I only had to change things a little bit to make it work. the sled starts religiously on the second pull, until today. EFI go pro 600 on a chevy 502/t56 combo. Got the valve covers apart and trying to figure out no start hot starts. [At] higher [engine speed] it runs fine. VW's with breathers oil runs down on the ground. The EFI is such a great improvement on overall drivability, runs like your DD. Feb 05, 2014 · How to Install the Fast EZ-EFI Unit - EFI Evolution We ditch our archaic '80s-era throttle body injection for a more capable EFI system that'll make the most of our engine. It worked fine for few months but then it started again and I was forced to get another ECU from Fleabay. Dyno tests were in the end of 2014 then finished building the car in 2015. FiTech Go EFI 400 hp self–tuning fuel injection systems have the ECU mounted on the throttle body for greater self-containment, clean installation, and easy setup. I already had assumed the Fitech was the reason behind the drain, but went through all the fuses and found the Fitech was indeed the culprit. Cam only produces 6-8 Hg of vacuum at idle. I removed the muffler not knowing that there was an auto choke solenoid tucked behind it. org members. If a SES light is experienced, DTCs P0172 and/or P0175 may be stored. The FiTech does squirt fuel in the throttle body when the key is turned to "RUN" to prime the engine Coil has power in both "RUN" and in "START". It started immediately and ran good for 30 seconds or so and then began to hunt for idle and run badly. May 30, 2017 · Crank Fuel 65F = At cold engines, the default calibration increases the fuel injected by a large amount, however, different engines and manifolds will show different needs. I have a MSD Blaster coil connected to a MSD ready-to-run billet distributor. May 08, 2018 · I want it to start cold nice and go ok. I've read a number of nightmare stories about the Command Center, none about the tbi unit. 4 - slow idle in gear - drops to around 600 rpm. The engine at 2500-2700 rpm goes to s. Sometimes while. This seems like the correct thread to ask a FiTech tuning question. 1 - either will not start or keep running on cold or warm start without depressing throttle. The FiTech does squirt fuel in the throttle body when the key is turned to "RUN" to prime the engine Coil has power in both "RUN" and in "START". 2 MPI Horn Output Possible Cause Corrective Action Engine Usage Available For Consumer Key on, beep for 2 seconds, then off. Which is the ECU for 3. 9, 65F= -16. The reason being that both like a different amount of fuel to air ratios for the engine to run properly, make good power, and be reliable. download fitech efi e85 free and unlimited. The fuel pump should run long enough. Nov 12, 2013 · This table is scaled by ECT and Engine Run Time ATMR1. The self-tuning ECU is easily located in the engine bay, the kit includes standard MAP and O2 sensors, and the throttle bodies can accommodate 4150-style linkage. So you got cranking and after start set but after a minute or 2 of idle time the engine slowly starts to idle rough or eventually even stall. It should be noted that before I would have gone down the road related to valve problems I would have done a vaccum test at manifold and if necessary a running compression test. Don't think it's that. It takes quite a bit of cranking and throttle to get it to start, then it needs throttle to keep it running until it warms up for a minute. Fuel supplied to the Command Center must be regulated to no more than 8psi. I replaced the IAC, no change. FiTech's ready-to-run Go EFI 400 HP 2-Barrel Throttle Body System is designed to upgrade 4, 6, and most 8-cylinder engines from using a carburetor and advance them into the modern world of EFI technology. Dirt Bikes. Dec 29, 2016 · Spark Plugs. Should I give up? 1989 Ford 2wd F-150 5. Joined May 17, 2010 Messages 3,044. when the engine was actually running. I hope this helps you keep a keener eye out for the little things. Off idle and during acceleration it runs fine. We installed the. 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. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. He has a 01 or an 02 zr 600 batteryless efi. they can restrict fuel flow at high speeds, enough to cause your engine to starve for fuel and misfire. I'm sure with a better carb and more tuning experience it would work way better. The motor has approx. The power control module or PCM now determines the speed at which an engine idles, based on several input-sensors. 302 crate roller, mild cam, trickflow heads. could the emissions junk be causing this missing n sputtering? we also set the timing this week n put a glasspack in place of converter. Yes, even though FiTech says it's not necessary. The only way to get mine to run worth a crap and idle was to go with an aftermarket EFI computer. 7L TBI Mercruiser with Bravo 3 drive on a Sig 260. Perfect for street rods, muscle cars, off-road trucks or nearly any carburetor vehicle. A decrease in fuel efficiency is another symptom of a bad or failing or failing cold start injector. These engines are dyno tested with your EFI system and ready to go! Take advantage of the latest EFI for better drive ability, trouble free cold start, no tuning required regardless of elevation, driving habits and part swap!. Since it runs fine even under load and acceleration for a while, I wouldnt think there is an issue there, but you are right and never know. Find FiTech Go Street EFI 400 HP Self-Tuning Fuel Injection Systems 31003 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. Water/methanol injection systems have been around for almost 100 years, successfully used on fighter planes, race cars and yes, even Corvettes. 55:1 gears in the 12-bolt. Low pressure fuel filter, vent hose for fuel pump kit also not in the fuel pump kit, have too buy for easy install. Our store offers reasonably priced and high quality Chevy Camaro EFI systems that will serve you reliably and improve the productivity of your vehicle. Almost zero vibration in the engine and overall I was excited to get started with this EFI system. It will crank the motor every time but then it will stall. Sudden severe overfueling with my Sniper EFI. (FiTech) is recalling certain Summit Racing Max 500-EFI 240500 fuel injection systems. Then entered some info into handheld, took about 5 minutes. 5 v at crank. Affordable Fuel Injection (AFI) was founded in 1997 with one goal in mind: offer fuel injection systems that allow superior performance to traditional carburetor systems, for a variety of applications, and make it affordable. I have a MSD Blaster coil connected to a MSD ready-to-run billet distributor. I plan to turbo the truck in the future but want to run what I have. Technical Tuning & EFI/EMS Electronics. 4 MPI 454 EFI 454 MPI 502 MPI 8. Start and run straight up hot or cold. 0 (stoic) will be ideal. May 24, 2017 · Fueling the Burn. Order a Holley Black Ceramic Finish Sniper EFI Self-Tuning Kit from CJ Pony Parts today! The Holley Sniper EFI kit is economically priced so you can have all the benefits of EFI and still have some extra cash to finish or upgrade the rest of your vehicle!. 0 system in 2013 and had to wait to get it, I think I was # 54 to receive it. The problem is most likely a failed integrated circuit in the ECU, which causes the injectors to run maximum open time (50%). Re: stumbles on acceleration, WHEN COLD, idles fine, usually Okay, the rotor does not return easily, so I'm going to look into that. I have to open the throttle after it fires and rev it a little to get it to stay running and idle. Simply bolt-on in place of your factory Holley or Q-Jet carb and the self-tuning system will eliminate cold start issues, hesitation, vapor lock and flooding problems. I then moved to Tanks Inc in tank Walbro with built in baffle. The reason being that both like a different amount of fuel to air ratios for the engine to run properly, make good power, and be reliable. The fuel pump should run long enough. There are no codes in the truck but I have found out that some codes are turned off using efi live when I had the maf unhooked and it didn't throw a code. For excellent performance and overall ease of operation, buy FiTech Go EFI 4 600 hp self-tuning fuel injection systems with Fuel Command Center 2. After spending half the summer working on this system I finally got it running "okay". 5" crossover into 3" log header, 3" downpipe, Tial 50mm BOV, Treadstone intercooler. I got my ez efi up and running about 3 weeks ago. 0/302 EFI Truck started rough idling, bucking - happened when it was cold, warm - couldn’t pin point it Truck got worse, felt it might be fuel related, replaced; -fuel pressure regulator -in line fuel pump -fuel filter -MAP sensor. With the old carb, the engine would get up to about 215 degrees, then start running rough, so I'd be forced to shut it down and wait for it to cool off. Oct 13, 2013 · SOURCE: running very rough at low revs. Run-on by dieseling is caused by fuel in engine igniting without spark. is, the worse the truck runs. It is a family owned business founded in 1952 by Bill Smith. I ran it with a blow through carb 1st and then the fitech 1200hp unit. The FiTech electric fuel pump runs when key is first turned to "RUN" to pressurize the system and then turns off. When FiTech Fuel Injection started doing business, the company hit the ground running – at full speed. Ford F-250 4. Engines should run smooth and evenly when at idle, never fluctuating in rpm or dying. The motor has approx. 3/4 ton, 350 TBI engine with 125,000 miles. I have the same problem. I understand why. I have a 1991 K2500 with the 5. 9L Supercharger(Sold. 0/302 EFI Truck started rough idling, bucking - happened when it was cold, warm - couldn’t pin point it Truck got worse, felt it might be fuel related, replaced; -fuel pressure regulator -in line fuel pump -fuel filter -MAP sensor. Comprehensive variety of chevrolet gmc and much more. Overhead view of the new FiTech EFI (Electronic Fuel Injection) installed on a Ford 460 engine. To be honest in all my years of Efi cold start tuning. Rough idle, bad hesitation on acceleration, perfect idle with TPS disconnected - 1994 Toyota Previa. It wa running ok, but not so much anymore. In July heat. On mowers without EFI, engines can slow down, but with EFI and E-Gov, the engine maintains RPM and blade speed, keeping you running at peak performance without burning through extra fuel. 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. Plan: Front mount Master Power T-70, Tial 44mm wastegate, 2. The marine system upgrades the poor cold starting and rough idle often associated with boat engines running a carburetor, while improving overall. i had to hold the gas pedal just to keep it from stalling. While underway you could not ask for a better running motor but while idleling it seems as though it is not running on all cylinders. 3 4wd May 01 2013, 12:34am Ok update truck ran good for 1 night. I'm considering moving over to the Pro Flow 4 from the Fitech 600hp EFI setup. While underway you could not ask for a better running motor but while idleling it seems as though it is not running on all cylinders. 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. 4 - slow idle in gear - drops to around 600 rpm. After about a 5 min warmup it doesn't surge so much but runs very rough. On petrol it idles fine and runs ok on the cruise, but the second you give more. Any ideas on how to get a better warm idle. If you don't carry out reset adaption after a new tune is downloaded to the ECM, your engine may be rough at idle and at low throttle, low revs running. As I would slow down for a stop sign or stop light, the car would run really rough and the idle did not want to come down. Readjusted carb settings I think it was a combo of all the above not any single item. This is my first. Another tip. If you see any sparks. E85 seems to mainly be used on boosted applications for this purpose, but I have tuned several cars that were N/A, but running E-85, because of their 14:1 static compression ratio. 0L Ford Small Block 1996, Go Port EFI Fuel Injection Kit by FiTech®. Holley Sniper EFI is a perfect match for any muscle car, classic truck, street rod, or nearly any other carbureted vehicle. Oddly, pump gas burns richer than racing gas at legal cruising speeds (30 to 70 mph). With the old carb, the engine would get up to about 215 degrees, then start running rough, so I'd be forced to shut it down and wait for it to cool off. I try to advance the throttle while I'm trying to get the engine to run. Never check the oil with the engine running. Had a bit happening since COTM, I had a massive exhaust leak that requires half the engine bay to be dismantled. Then once it warms up and I shut it off It'll be hard to restart once It starts I hear a click inside the computer and it cuts out like its about to die and then comes back if I reverse the left and right oxygen sensors it'll die out when you hear that same click. FiTech puts the engine and transmission EFI management back in your hands. Should I give up? 1989 Ford 2wd F-150 5. Just went for a quick run and a play with the timing, very happy with this EFI so far. Right now it appears that if he uses his edge to turn on the exhaust brake when the truck is cold it does not idle rough. Such as " crank 20f, 65f, 170f. Hi, I have been trying to work with a 6. 3/4 ton, 350 TBI engine with 125,000 miles. The first 250-300 miles were amazing as the Sniper EFI worked flawlessly. The FiTech self learning software couldn't figure out how to make a warm blooded motor run right when cold. The engine runs well for the first 10 minutes or so, but once warmed up and in "closed loop" operation, it will start to starve for fuel, then recover and run fine. 14,790 likes · 131 talking about this · 119 were here. The results I've only put 120 miles on the FiTech so far, but I have to say it's worth every penny. Re: stumbles on acceleration, WHEN COLD, idles fine, usually Okay, the rotor does not return easily, so I'm going to look into that. My sons 570 is getting harder and harder to start when cold. I recently purchased and installed one of the best in the market Holly Sniper EFI Kits on my motor. Board index » TFFN Online » EFI Conversions & Tech. To be honest in all my years of Efi cold start tuning. Dec 23, 2008 · My Nissan pathfinder starts and runs great when it's cold but after it gets to normal running temperature and you drive it then it starts skipping really bad and becomes hard to keep running I had it tested and it come up with the knock sensor and I just wanted to see have anyone else had that problem and did changing the knock sensor solve it. Start and run straight up hot or cold. Place throttle control midway between slow and fast positions. 3 other times backing out of a space after warm start. 454 Runs Rough. Which Trans-Dapt adapter works? Saw that 2210 was used on Jason's, but I do not have square-bore intake. I have the FiTech EFI on my 1975 Ford Bronco. Any of my search term words; All of my search term words; Find results in Content titles and body; Content titles only. Additional info: A local racer installed a used 225 ecu on my motor for me to do a test run yesterday. The Go Street EFI system is ready to run WITHOUT programming. easy install, run great, adj fast, cold start, make more power than the old manual choke 600 carb, no mess with choke to make sure runs. I did a good job welding the O2 bung in so it should be fine. It's only the first start in the morning, and instead of cranking a few quick times and then growling, there's a cough-like pause before it growls. I have called fitech half a dozen times. i have a question about a 1813 thunder series avs carb i purchased in 2007. I found that pump gas burns much leaner at idle (below 1,000 rpm) and high rpm (above 4,000 rpm) during hot weather than racing gas. MERCRUISER HORN WARNING SYSTEMS 90-898301003 JUNE 2007 Page 5 / 10 Models All MEFI-3 V-6 and V-8 Sterndrive and Inboards 4. That's why i'm asking. A MAP (Manifold Air Pressure) sensor thet is telling the ECM thet the manifold pressure in the engine is high when it is low. Running Fitech 4bbl on mine, no issue on cold starts, still tuning for throttle response. Yamaha 50 runs but no power, won't plane - I got a 2003 Yamaha 50 on a 16ft seaark. There are no codes in the truck but I have found out that some codes are turned off using efi live when I had the maf unhooked and it didn't throw a code. Oct 13, 2013 · SOURCE: running very rough at low revs. Read honest and unbiased product reviews from our users. (Hesitates, then surges off). Speeds up then slows down. I'm only getting a little more than 2mpg. I would try to start the ranger in the morning and it was a good 30 seconds of cranking before it would start. have done at least 20 cams on.