Fitech Efi Runs Rough When Cold

But after that, everything is very good. I've had E-Street 2 EFI with the Ignition Control Kit on it for about 18 months now. 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. If there is a definite transition in how it runs warm/cold, with it running better warm, it would indicate the CTS COULD be a problem. Battery voltage is supplied to the lamp bulb. The Holley HP EFI system tunes your car by itself while you drive down the road. FiTech - running rich, AFR not trimming? Anyone checked their logs to see the AFR's to be rich, if not very rich and the AFR trim % is at 0? I did some testing yesterday with my replacement unit, and it's doing the same as the old one. On startup the car will not idle above 400 rpms and dies without me applying throttle. Worst after stationary idle, but also after. The is an introduction to tuning with a programmable electronic fuel injection ECU. This is a great time to visually inspect the overall Sniper EFI install. It ran great but always was rich. If it should stall it will not fire up again until it is stone cold. How does an idle air control valve work What is an idle air control valve. 5 efi V8 (from a Range Rover)? Apparently it’s the reason why the engine is a little irate when first started, but sorts it self out when warm. Anybody have any ideas?. The car runs great, fires up and warms up on a cold day much better than any of the carb solutions did. Overall in very good condition for the year bodywork has 'patina'. Any ideas on how to get a better warm idle. new spark plugs) and had the throttle bodies tuned up - but it hasn't really changed anything. That being said, fuel pressure can be too high, ECT readings too cold (10000 ohms at ECT cold, is way too cold and motor will flood!) Make sure the IAC is open cold. HP EFI Engine Management Kit For 86-93 302H. Rockers are loose on some of the valves. The problem is on a 99 Ram with the V10 and the issue is this. The first 250-300 miles were amazing as the Sniper EFI worked flawlessly. Can be adjusted for cold or hot start issues. Cold Engine Enrichment. I have a 190 Nantucket with a 2004 Mercury 115-HP EFI FOURSTROKE that stalls from sudden loss of fuel after running [for about five] minutes. After 20 minutes of running it would start stuttering and surging, then die, bring it in, no spark. Looking for some help. This helps keep the temperature under control. Pressure Drop Posted on May 20, 2015 by Josh Davis It is important to understand the relationship between fuel line size and fuel pressure when planning a fuel delivery system. After much searching and numerous calls to FiTech I was directed to "Team Chevelle" forum. The first 250-300 miles were amazing as the Sniper EFI worked flawlessly. The engine is a 385 stroker, 10. Check the cold resistance of the DME temperature sensor ELECT-19: Vacuum Leak: Inspect all hoses connecting to the intake manifold which are downstream of the AFM. The FITech came loaded with a base cal for a moderate 350 and consequently seemed to learn a bit more quickly. Has a few knocks and bangs here and there mostly in the bed. Is there a way to identify whether it is electrical or mechanical?. Now she’s running like a champ. FiTech in the field helping our our valued customers. been that way for 2 years and about 1000 miles. SCE ICS Titan Head Gaskets. Less gasoline is evaporated when the engine is cold. I documented this modification on my blog as well, search "Modified Factory Pontiac Quadrajet Intake for Square-bore FiTech Throttle Body EFI" on the web. 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!. I think for your engine, either system would work well, but depending how lumpy your cam is, you may want to stick with FITECH, as they have the ability for running love vacuum signal. If the cold start injector leaks at the nozzle, and allows fuel into the intake this will cause an excessively rich mixture. The EFI-8 is an eight-injector system that is intended for applications up to 1,200 horsepower. DOWNLOAD 50HP Outboard Repair Manual Johnson Evinrude Mariner Suzuki Mercury INSTANTLY DOWNLOAD a 50 horsepower outboard repair manual straight to your computer in seconds. There you will see three cranking fuel selections. I recently bought a FiTech Go EFI fuel injection system for my big-block Chevelle. If this is your first visit, be sure to check out the FAQ by clicking the link above. Bottom line is that if it is corroded like his was, the EFI senses some how that the engine is warm and does not distribute the right fuel amount for your cold start problem. If you did not add STA-BIL to your gas tank before you put it up last time and the quad had sat for any lenght of time without you riding it, your carbuerator will have. FiTech recognizes that not everyone needs or has 600HP or a. 700 lift and the Power loss from going to a BDS EFI hat over the Mechanical was very substantial, let alone all the burping and farting it added to the system. Cold Engine Enrichment. I have never seen a carb that you didn't have to tune to offset changing. I found I have like 60 psi compression when its cold and 150 psi when its hot. Hope this helps. All pump flow, minus engine consumption, must always run to the regulator, wherever it is. Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership when you get a Idle Air Control Module (part number 401-959) from J&P Cycles. An engine has no idea how it is being fueled. FYI, if the FiTech system works out, I'll be selling my offy intake, carbs, and lots of extras for way cheap, stay tuned on the parts thread. Sometimes while. Walbro 450 - 800HP EFI Submersible E85, Flex Fuel and Gasoline High Flow Fuel Pump sku: 866-800E. Do you demand more from your system? If so, the FiTech Go EFI 4 Power Adder is for you. and 351W Based Engine Combinations. Induction Manifold. My problem is it has a rough idle and it is hard to start. 3 to a stroker 427, we have you covered! Check out the list of features and you will wonder why it’s never been so simple to ditch that old factory hardware or top off that fresh long block. it would finally smooth out once it warmed up, only stalling or bogging down every now and then. Saw that too. 1969 dodge w200 power wagon truck for sale. been that way for 2 years and about 1000 miles. With the XFI self-tuning calibrations, the FAST system can easily be set up to provide cold-start idle and other street-performance qualities related with EFI operation. It is a family owned business founded in 1952 by Bill Smith. I look forward to fiddling with my own EFI setup. dirty injectors,bad fuel,pump Sometimes it is air flow meter or hose to or from turbo split. Yes, even though FiTech says it's not necessary. This kit is capable of 25 lbs of Boost right out of the box and can be used in a blow thru turbo or blower application or on a single roots style supercharger. always runs super lean then rich when you stomp on the gas no matter what i adjust. Was very surprised when that didn't happen this time. start, stay running, higher idle, then come down to idle rpm in cold weather that we expect? FiTech is a group of OE engineers bringing you performance parts at an affordable price, and all of our new car ECU features are packed into our performance division. Suitable for that junkyard 5. The service procedures recommended and described in this service manual are effective meth-. Then sometimes it will idle but surge and idle rough then stall. The colder the outside temp. Check the cold resistance of the DME temperature sensor ELECT-19: Vacuum Leak: Inspect all hoses connecting to the intake manifold which are downstream of the AFM. FiTech Go EFI 2 Barrel 400HP System. I ordered the EFI 2. “Enthusiasts that are realizing that electronic fuel injection systems run better in the cruisers are really going to see the biggest advantage in converting to a self-tuning EFI system. It ran great but always was rich. Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. An easy check is to spray your ignition wires with water - a fine mist from a spray bottle works best. I have some 5mm ID hose for that small hose that runs through the wing from the top of the evaporation tank in the NSF arch but it is a pain to get to and I cannot see the routing. This corvette doesn't have much room to mount anything so the CDI box is on the passenger side under the dash and the efi unit will. I don't think I have any vacuum leaks but will go check again. Runs on 2 cylinders. This causes the fuel to be more burdensome to burn due to the fact that it is burnt when it is evaporated. For cold starts add or subtract fuel from Crank fuel 65f, for hot starts add or subtract fuel from crank fuel 170f. Fitech EFi System We have been waiting for this for a while. We're using the Edlebrock Fuel Sump system. Desirable short bed and Stepside style. 5 EFI Rangie for a while by re-soldering the ECU myself. Ls1 running rich. I have seen this now in 3 2011 we have bought here in michigan also we have found wiring harness problems causing codes , check engine lights high idle and runs rough concerns. has been tuned up, can it be the coil? was told that it was wet gas Answered Mechanic said that it was water in the gas the tank has been emptied, the carb cleaned, new plug, and new blade. 2016 Project EFI. I'm considering moving over to the Pro Flow 4 from the Fitech 600hp EFI setup. the truck starts fine when the motor is cold but when it warms up to normal operating temp it dies and wont start until it cools down but its not overheating and when i drive it it runs a little rough. This kit is capable of 25 lbs of Boost right out of the box and can be used in a blow thru turbo or blower application or on a single roots style supercharger. I'm running a tanks inc efi tank with walbro 255 pump. Now she’s running like a champ. While running normally it runs great. Cold Engine Enrichment. The DME computer in turn supplies a leaner mixture to the engine than that which is normally required. • For more convenient and accurate testing of EFI components, it is recommended dealers utilize the Digital Wrench™ Diagnostic Software (dealer only), or testing may be done manually using the procedures provided. my briggs mower won't idle for the first 10-15 seconds. 45 degrees is not really all that cold and a bike should run withnegligiblee differences from 75-80 to 45 degrees. A common complaint, especially when temperature start to drop is, “My car runs poorly cold, or my car is hard to start cold”. Is there a way to identify whether it is electrical or mechanical?. required operational parameters necessary for the running of the engine. A broad range of problems can cause rough idling in a motorcycle engine. Congratulations to ThirdGen. The marine system eliminates the poor cold starting and rough running often associated with carbureted boat engines, while improving overall performance, fuel economy and throttle. Edited by RamblinMan - Apr/09/2016 at 7:07am. XJ 6 Series III 4. That being said, fuel pressure can be too high, ECT readings too cold (10000 ohms at ECT cold, is way too cold and motor will flood!) Make sure the IAC is open cold. Car won't start unless I give it gas if it starts at all. E85, Flex Fuel and Gasoline compatible fuel pump that flows 450 L/Hr. 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. The Game Changer has arrived from FiTech with its latest addition to the line of Go EFI Throttle Body EFI systems. 8 EFI) This should cover most 87-96 V8s (302\351); for the I6s (300)s the solenoids are in the same general area, as well as the valves. Over at Chevelle. Now it runs really rough but only seems to be when cold. I replaced the MAP ( Manifold air pressure sensor) As well as the coolant/ water temperature sensor. It would always restart. 6-liter powerhead delivers exhilarating acceleration and top speed to run offshore with confidence, while its generous displacement and robust design provide uncompromising durability and reliability. Summary Fuel Injection Technology, Inc. I double checked spark healthy spark at sparkplug. I have never seen a carb that you didn't have to tune to offset changing. start, stay running, higher idle, then come down to idle rpm in cold weather that we expect? FiTech is a group of OE engineers bringing you performance parts at an affordable price, and all of our new car ECU features are packed into our performance division. In order for an engine to start and run cold, it requires more fuel than when it is hot. An idle air control valve literally bypasses air around a closed throttle plate so the engine can get air at idle. My ONLY issue with the efi is it still does run a little rough for about the first 30 seconds on a cold start up. Re: Rough idle when cold Oct 18 2012, 12:56pm Hey man you might want to check you'r timimg or timeing sensor or maybe you'r cam sensor. Josh Williams has a cold start video on YouTube that should be viewed as well and it may even have a link in the pinned post. In your Corvette's engine bay, from front to back, it goes air intake ("lid"), throttle body. I tightened it, and it started right up. Well, here again, it depends on what you want to do with your vehicle. Will report back on how she runs after I get all this wiring cleaned up. Start the engine and closly check if you see any sparks between any of the ignition wires and the rocker covers or any other part of the engine. mercury carb idle screw; mercury efi 4 stroke wont idle; mercury efi 90hp 4 stroke rough idle; mercury efi rough idle 2012; outboard will only run outside idle screw range; outbored motor idles then dies; parts for 1988 120 hp Mercury idle speed arm; possible cause for dies at idle for a 95 Mercury; possible causes of low engine vacuum at idle. 22R EFI idles rough Engine is idling rough and seems to be using a little more gas. unplug distributor power wire and have someone turn it over for ya. 6---1 lifter expanded out and wouldnt collapse,causing the rocker arm to fall out of place and the valve could never opentry unplugging 1 coil pack at a time while running and listen for a change in the way it runs,if there isnt a change then its probably a. Dyno tests were in the end of 2014 then finished building the car in 2015. Not sure if related. Bottom line is that if it is corroded like his was, the EFI senses some how that the engine is warm and does not distribute the right fuel amount for your cold start problem. There is alot of things this can be my truck did the same thing,btu this was when i put a new cam in it. Never heard of it until then. Common Misfire Causes. That's what FiTech delivers to your engine through its' EFI system. Terminator can run a bit expensive, may want to check out the holley terminator EFi-- I have no direct experience with it, but I've read decent reviews-- it's just under $1k,. The engine is a 385 stroker, 10. I built a bracket from UHMW so the surge tank (FiTech calls it a “Fuel Command Center”) could bolt to an existing bracket that runs along the PS of the radiator. ­The whole "starting your car in cold weather" thing can be a big problem for people who live up north, and especially for people who live in really cold places like Alaska. Are you ready to put an end to cold start issues, hesitations, vapor lock, and flooding? Well then FiTech Fuel Injection 2 barrel system is offering you a golden opportunity for impressive looks and performance. The fuel that you purchase at the pump these days is also less kind to carbureted applications. SOURCE: 2001 ford 4. The dual quad EZ-EFI Add-On kit includes a spare throttle body with four fuel injectors, four add-on harnesses, a dual linkage kit and a fuel line crossover hose with fittings. An easy check is to spray your ignition wires with water - a fine mist from a spray bottle works best. Can be adjusted for cold or hot start issues. I run about 6" of line inside the tank. THROTTLE BODY The throttle body, mounted on the intake manifold, is an assembly of the principal components of the EFI (Electronic Fuel Injection System). Has new rough country 4 inch suspension lift. 3 TBI Blazer just started running rough and very rich won't accelerate no power. If the engine is rough when cold, it is probably either too rich or too lean; use a vacuum gage to find where that is. So, you’re on your own with troubleshooting and tuning if you buy FiTech. The Yamaha guys said that it's just normal for the bike to be this rough. Re: ENGINE RUNS COLD 5. But (yes there's a but) I'm having to keep it a bit richer than I'd like due to air/fuel distribution being a bit less than ideal. Are you ready to put an end to cold start issues, hesitations, vapor lock, and flooding? Well then FiTech Fuel Injection 2 barrel system is offering you a golden opportunity for impressive looks and performance. And the 2007 Recon is Carburated and not fuel injected so you'll have to be patient. You take your foot off the gas pedal to apply the brake, but your engine begins to idle very roughly, and then it stalls. plus its self learning feature is second to none. Once I have those times I am going to swap intakes as I traded a friend for an RPM air gap so I can shed some light on the LD340 vs Air Gap intake comparison. "What we've done is taken the four-barrel conversion EFI system and made it affordable," said Farrell. Started to run very fat and has ever since. holley terminator EFI. It either has to be fuel or spark. i jumped the terminals in the diagnostic port to check the timing, and it was jumping around from 9-12 or so. • For more convenient and accurate testing of EFI components, it is recommended dealers utilize the Digital Wrench™ Diagnostic Software (dealer only), or testing may be done manually using the procedures provided. The EFI-8 is an eight-injector system that is intended for applications up to 1,200 horsepower. If your car, truck, or SUV doesn't run up to snuff, you can pull off to the side of the road and call for towing assistance. The wide band allows for a much wider tuning window. In case you are hunting down an upscale EFI system to increase performance of your pride and joy, you’ve come to the right place. great ideas- also check the voltage at idle- my efi was doing same thing, I changed the fuel lines and etc. 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. Efi from Eldebrock only quotes around 20hp increase once fitted to mild 400sbc in a 55 chevy. • 80% of all EFI problems are caused by wiring harness connections. Suitable for that junkyard 5. Battery voltage is supplied to the lamp bulb. Unless your spending big dollars Hp gain will be modest. Running better when cold could be due to the normal enrichment during warm-up. Do not use a replacement part of lesser quality. it definitely has a hard time staying cranked when the engine it cold. Well lets say it was not good for two broken pistons. It idles rough but as soon as any load is put on, the engine runs very roughly. Get or borrow a fuel injection fuel pressure gauge (parts stores have loaner programs). The products featured in this review are the FiTech 30002 Fuel Injection System and the FiTech EFI 40003 Fuel Command Center system. It progressively got worse and now its not drivable. Being in a truck the carb tune was temperamental when I would tow or it was cold. You may have to register before you can post: click the register link above to proceed. The EFI install was easy once all the small items were at hand. i will run it for a few more days on the 55 and then switch. Out of nowhere, 20 miles later, it started losing power, burning gas and the motor was shaking. (FiTech) is recalling certain Summit Racing Max 500-EFI 240500 fuel injection systems. Once it hits 180 degrees idles at 950 as st and performs flawlessly. The stock 36hp engine came with a carburetor which had the shortcoming of a typical carburetor engine: difficult cold start, rough idle, stalls, lack of power, and frequent maintenance. FYI, if the FiTech system works out, I'll be selling my offy intake, carbs, and lots of extras for way cheap, stay tuned on the parts thread. Another thing, the hose is up high and is only immersed in gas on the pump end when I have 3/4 tank or more, half of the line isn't immersed at all except with a. 3 Tips: Clean Out the Fuel Tank: Clean out the fuel tank as part of a new installation. Engine was running before I pulled carb off and replaced with FiTech unit. The Go Street EFI is a ready-to-run system that strays away from the programmable features and sticks to the basic functions necessary to get the best performance and economy out of your street and mild performance engine. Oddly, pump gas burns richer than racing gas at legal cruising speeds (30 to 70 mph). A downloadable repair manual is a digitally delivered book of instructions that provides step-by-step maintenance, troubleshooting and repair procedures. -All our maps eliminate backfiring. This Ranger has only 80K miles and has been babied since new. 7L that after the EGR was deleted the truck would run horrible until it got up to operating temps. Champion Spark Plugs for Yamaha Outboard Motors Champion spark plugs are original equipment on many outboard and inboard motors and are excellent replacements for everyday engine maintenance. The following procedure will instruct in retrieving and clearing ECM Diagnostic Trouble Codes and TSM/TSSM codes through the. Fitech sent me a new one and it does the same thing. -All our maps eliminate backfiring. Once you have this set getting the cold start set is rather simple. The Holley Sniper you already know about, FAST EZ-EFI, FiTech is a new one, and I think Professional Products(yuck) has one. That was on a 15 horse Kohler though. It worked fine for few months but then it started again and I was forced to get another ECU from Fleabay. The Holley Sniper EFI Self-Tuning Kit is compatible with forced induction applications. In the "Old" days, that was a stuck choke. 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. With the XFI self-tuning calibrations, the FAST system can easily be set up to provide cold-start idle and other street-performance qualities related with EFI operation. The pump also will run when the key is in "START" as the pressure drops during cranking. This item: Camaro Gas Tank, EFI Converted, Without Evaporative Emissions Control, 1970-1973 Camaro Gas Tank Mounting Straps, Stainless Steel, 1970-1973 Camaro Gas Tank Strap Bolts And Hardware, Kit, 1970-1973 Camaro Gas Tank Mounting Straps, OE Steel, 1970-1973. Less gasoline is evaporated when the engine is cold. remove valve covers. One more thing to check: bad crimp to an injector connector, or an inside the insulation wire break. I want it to start cold nice and go ok. Not sure if related. The cold effect on liquids evaporation. November 2016. I don't know exactly what's wrong with it but I got tired of it making me stop on the side of the road and let it cool off before it would run. com the CC problems are well documented, FiTech always insists that it is unaware of ssues with the CC. Quick ratio steering is awesome (as is the fiero gt wheel I steer with). We typically run these air cooled motors around 11. Cutting out and sputtering off idle all the way home from town. Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. 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. My FiTech works reasonably well today on my fresh 383 SBC stroker. With features like a high-capacity radiator and thermostatically controlled cooling fan. b) a small air leak around the carb intake. 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. Now I have removed the Jacob's ignition system because it started messing up. I tightened it, and it started right up. One piece driveshaft. After 20 minutes of running it would start stuttering and surging, then die, bring it in, no spark. 2,000 rpm when hot but when cold it would struggle to life & I couldn’t touch the throttle until a reasonable amount of heat had built up in the engine. Running to cold and rich and fouling plugs. so far i am a tiny bit pretty disappointing with the system. You can get more power by running a bit leaner, but there's no point in that if the motor can't finish the race. (mike)>> the fitech blows any carb away when it comes to options, streetability, fuel economy, and cold starting. They have a FiTech forum that even FiTech themselves could probably learn a thing or three from IMO. Put an end to cold start issues, hesitations, vapor lock, and. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. 10067353 Pace Fuel Injected Chevy 350 300HP EFI Turnkey information about FiTech EFI systems components needed to make this engine ready to run, right out of. so the FiTech is all installed. FAST wants $300 to update the controller on my original EZ-EFI 1. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. dont think it went to engines that new but possible. Ls1 running rich. For cold starts add or subtract fuel from Crank fuel 65f, for hot starts add or subtract fuel from crank fuel 170f. A broad range of problems can cause rough idling in a motorcycle engine. DISCLAIMER: this information is for reference only. been that way for 2 years and about 1000 miles. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. Do you demand more from your system? If so, the FiTech Go EFI 4 Power Adder is for you. Could this cause a no start condition when hot? Thanks in advance 2017 GMC Sierra Denali Ultimate Pearl White 6. This will allow me to keep factory fuel setup from the mechanical fuel pump back. Call Us: 800-669-8442; My Account; Checkout; View Cart (0). No more stuck float bowls after winter, no more flooded engines on cold mornings, no more fouled plugs, no more rough idle or vapor locks on hot days. Problem is when I first start the truck in the morning (or after sitting awhile) and go to take off, it will chug, bog out, or barely go for a few seconds, then snap out of it and run fine. I use the FITech with the RobbMc PowerSurge. Outboard that runs somewhat rough The WoodenBoat Forum is sponsored by WoodenBoat Publications , publisher of WoodenBoat magazine. The Go Street EFI is a ready-to-run system that strays away from the programmable features and sticks to the basic functions necessary to get the best performance and economy out of your street and mild performance engine. The car will have less power and just generally run pretty rough until it warms up in about three minutes. Walbro 450 Or Walbro 460. been that way for 2 years and about 1000 miles. This item: Camaro Gas Tank, EFI Converted, Without Evaporative Emissions Control, 1970-1973 Camaro Gas Tank Mounting Straps, Stainless Steel, 1970-1973 Camaro Gas Tank Strap Bolts And Hardware, Kit, 1970-1973 Camaro Gas Tank Mounting Straps, OE Steel, 1970-1973. My question is on cold start. It would run OK but probably be on the lean side, just do it to check over the idle speed. While cold, the insulation could be stiff enough to keep the connection lined up. We installed the. The distribution block also houses the over-run valve and feeds air into the manifold from the auxiliary air valve. With the key in “run” position (engine off), the ECM signals the pump to run for approximately 30 seconds then shut off. The recall began on May 15, 2018. org members. There will be another post about installation and running in the near future. DOWNLOAD 50HP Outboard Repair Manual Johnson Evinrude Mariner Suzuki Mercury INSTANTLY DOWNLOAD a 50 horsepower outboard repair manual straight to your computer in seconds. The following procedure will instruct in retrieving and clearing ECM Diagnostic Trouble Codes and TSM/TSSM codes through the. Spec 350ci V8 with fitech go Street EFI fuel injection this was fitted and runs really well. Sometimes it has a really rough idle. The car runs great, fires up and warms up on a cold day much better than any of the carb solutions did. Sometimes while. adjusting idle on an efi engine? If this is your first visit, be sure to check out the FAQ by clicking the link above. The good thing about fuel injection is that its controlled by a computer. This process works well but, however, let it be known NOTHING beats a dyno tune from start to finish. Family work truck husband. The fuel that you purchase at the pump these days is also less kind to carbureted applications. Anyone here successfully running an aftermarket EFI System, Megasquirt, Holley Hp, Sniper, Atomic, FITech? Post by clintonvillian » Tue Feb 12, 2019 3:16 pm Just curious if anyone is running any of the above. How to check for fault codes. and 351W Based Engine Combinations. 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. I don't think I have any vacuum leaks but will go check again. 5 efi V8 (from a Range Rover)? Apparently it’s the reason why the engine is a little irate when first started, but sorts it self out when warm. Still won't have timing control. glider, Jan 22, 2009 #10. A broad range of problems can cause rough idling in a motorcycle engine. Boat runs rough and cuts ff when warm/hot Welcome to TheMalibuCrew! As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It starts fine when warm, and still idles and runs smooth once it starts, and, is not underpowered at all (other than the obvious standard underpowered condition of a 1. I've read a number of nightmare stories about the Command Center, none about the tbi unit. And the 2007 Recon is Carburated and not fuel injected so you'll have to be patient. 7L EFI Rough idling after warm up Just in case anyone was following this thread or has the same problem in the future it has been resolved.