8L 5speed mustang has an idle issue, When cold it will barely idle on it's own (you have to give it throttle else i drops below 400rpm stumbles for a little bit then stalls). I have a 98 v6 Stang, pretty much bone stock, with just the CAI and a 40 series Flowmaster 103400 miles. 8, standard GT mustang (engine was changed from v8, I recently bought it just as it is now)! It has no power, it's hesitating, sputtering and backfiring when accelerating. If this is your first visit, be sure to check out the FAQ by clicking the link above. What this series of articles is aimed at is how to fix the most common idle problems found in the Mustang. Re: who all has rough idle in a 3. 0L V6 engines for an intermittent stalling problem. No leak from what I can tell. starts out fine but within in about 30-60 seconds from start when cold it starts to shake. That would at least settle my mind about the rough idle. Top 10 Causes of a Rough Idle | JL Motorworks. 0l? I have to give my car the "anti-idle surge vacuum leak" and it reads 14 inches at idle, and 16 inches with the leak plugged, surging away. It was running rough, missing and backfiring plugs were trashed. Does your 1996-1998 Cobra Mustang have a rough idle on startup and when driving? Replace your Idle Air Control Motor with this high quality reproduction from CJ Pony Parts today. The 270s are on a wide LSA and therefore have minimal overlap. (p0171/p0174). As the engine drops down to an idle, you hear a strange sound from under the hood. Jump to Latest Follow Besides the rough idle the truck has lost major power and when I do step on it, the intake noise is. Ford Mustang ECU ECM PCM repair. But im wonder who has it, or who did what to fix it, im thinking seafoam and new plugs might do the trick. , Drive, 2, or 1? This doesn't sound too good folks. We are the oldest and largest V6 Mustang forum on the internet. Re: who all has rough idle in a 3. Top 10 Causes of a Rough Idle | JL Motorworks. ) I've been driving a 4. Automotive Forums. Application - Fits 1996-2004 Mustang GT - Fits 1996-2001 Mustang Cobra. The 1998 Ford Explorer has 1 problems reported for runs rough at idle. through the seat pedal, steering wheel, etc. When an Idle Air Control Motor starts to malfunction, it can cause a rough idle, check engine light, this will decrease the fuel mileage and a poor running conditions. If the idle is rough or wont stay running your Idle air control motor will need replaced. I used to think it was worse when - Answered by a verified Ford Mechanic. Information that addresses safety, reliability, performance and comfort related problems with Ford Mustang V6-232 3. Mustang Engine Temperature Control - Troubleshoot Engine Overheating - Mustang Monthly Magazine With the radiator cap off, start the engine, run it at a fast idle (1,500 rpm), and watch. Upgrade Ford Performance Parts with Steeda. This OPR EGR Vacuum Modulator is a direct fit replacement for 1998 to 2004 4. Stalling 2002 V6 Mustang (Auto) Posted In V6 (1994-2004). The motor in the throttle body can go bad, causing the “wrench light”, rough idle or your car could shut off intermittently. Rough Idle,no power, Codes OIl leaks. For this reason we have come up with a Troubleshooting Guide to help you out. Nissan Maximas with a vacuum leak can idle very rough, like the engine is struggling while the car is stopped at traffic lights. Less than 49K original miles. Checked codes indicated MAF, removed and cleaned (electric contact cleaner), cleaned throttle body and intake (throttle body cleaner) and replaced EGR valve. Rough Idle, hesitation on acceleration, loss of power When I start the engine its starts up right away with no issues. 0 mustang engine throw a rod at 200,000- 218,000. Once the car has been running for a while and the engine is up to operating temperature I run into the following issue: When I stop at a traffic light the car goes into idle ok. Once you take off again, it runs OK. 8L TSB (Technical Service Bulletins Ford Mustang) and Automotive Recalls. I have a 98 v6 Stang, pretty much bone stock, with just the CAI and a 40 series Flowmaster 103400 miles. Ive had a 2000 Alero v6 3. Put new spark plugs and spark plug wiring and new fuel injectors and putting new. 2002 Jeep Wrangler. 3 engine diagram,2002 jaguar s-type 3. Tuning products - dpbt. CASE 1: If the engine idle grew worse as you applied vacuum with the vacuum pump and the vacuum pump's gauge needle stayed steady, then this result indicates that the EGR valve is working correctly and that the EGR passages in the intake manifold (and in the EGR valve itself) are not blocked with carbon. 0s needing a idle re-learn. Choose top quality brands API, Delphi, Forecast, Hitachi, Motorcraft, Ramco, Replacement, Standard Motor Products, Walker. FUEL PRESSUREFUEL PRESSURE SPECIFICATIONSSPECIFICATIONS 2. 8L) (at: autotecnico-online. Upload your own picture of the Mustang Comp Cams Xtreme Energy Camshafts - Stage 3 (96-98) Please make sure to hold your device horizontally (like a camera) rather than vertical (like a phone). Tap the to learn more about the most common Ford Mustang problems. I checked everything and everything seems to be secure and in place. The valve, as the name suggests, controls the idle. 8L engine shared the same 3. You're tooling along on your way home from a cruise night or a car show when you pull up to a stop sign. I recently bought a 2004 Mustang convertible V6 auto with 180K miles to be my daughter's first car. Hope this helps. Tappet Noise - pcphoneapps. This covers year models 1986-1993, and 1994-1995. With 1994 to 2004 V6 Mustang models coming. We provide the right products at the right prices. 8 v6 cause these issues along with stalling at light and when shifting into gear. i have same codes and i changed gaskets and van runs good. 6L 4V motors. Featured How-Tos. Spoke with the guys at Granatelli and they sent me the c-plus model. 32 degrees or below). If you're looking to boost the power output on your Mustang, one of the first mods usually is a Cold Air Intake. 3L Ranger or Mustang is a diagnostic plan. When my car is at an idle my rpm bounces anywhere from about 450 to 650 and doesn't sound right. I replaced the iac motor twice, and the intake twice. Information that addresses safety, reliability, performance and comfort related problems with Ford Mustang V6-232 3. These valves usually do not require maintenance, but can become clogged with carbon deposits which could cause rough idle, decreased fuel mileage, overheating, and sometimes engine knock. Rough Idle And Loosing Coolant? Sketch 1998 v6, no fan and now a/c. For the best viewing experience please update your browser to Google Chrome. Testing P0301, P0302, P0302, P0303, P0304, P0305, P0306. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Once the car has been running for a while and the engine is up to operating temperature I run into the following issue: When I stop at a traffic light the car goes into idle ok. Research, compare and save listings, or contact sellers directly from 2623 Ranger models in Independence. The check engine light is on and I know I should first have the codes - Ford 1998 Mustang question The idle is. 0 Vulcan Tech Lots Of Problems Solved. No scan tool is needed to troubleshoot and test the Mustang TPS and this article will show you how to get it done. The idle air control motor (IAC) controls changes in idle caused by engine load. Hope this helps. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Damage to the car’s carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. Sometimes acts like it will die. Today I replaced my spark plugs, spark plug wires,ignition coil, fuel filter and my canister vent valve solenoid. The 1998 Ford Explorer has 3 problems reported for cold engine idles rough. 2001 Ford f 150 4. I couldn't find anything anywhere on the internet that would say whether the 2002 SS LS1 has a performance cam. 8L VIN 4 SF Service Bulletins TSB Number Issue Date TSB Title 03-14-8 JUL 03 A/T - Cooler Flushing Service Tips 03-14-4 JUL 03 Ignition System - Engine Misfire Diagnostic Tips 03-11-6 JUN 03 Electrical - Wiring Soldering/Crimping Tips. Genuine Ford Part. 8 running lean rough idle and it cuts off. Minor dents & dings, back window out. Apparently this is something the 4. year: 1998 engine: 4. com (or Ford 4L or Ford 4. 8L Rough Idle But Only Sometimes; 1994 Chev Camaro V6 starting issues; 86 Camaro with Iroc logo in wrong place? 93 Camaro 3. Buy a new Idle Air Control Motor for all 1994-1995 Mustangs from CJ Pony Parts. Ford has also issued a recall (04S13) for 2001-2003 Ford Escape sport utility vehicles with 3. Once you take off again, it runs OK. Solving your idle problems part 2 - Cleaning your throttle body: In part one we covered the most common problem that will cause idle problems, the IAC, but there is an often overlooked area of the intake tract that also regulates how much air enters the engine. 1998 taurus rough idle and revs up on its own. Symptoms - Rough Idle at dead stop in Drive, Or Park. I can hold the idle up, 1500 rpm, via the peddle and it will be fine. Tappet Noise - pcphoneapps. Exact location may vary depending on vehicle year / make / model. The TPS (throttle position sensor) on your 1996, 1997, and 1998 Ford Mustang, with a 3. Your Ford (or Mercury) 4. 1998 Mustang: is running rough, what can be the cause 1998 Ford V6 Mustang; 91 5. The Mustang’s idle strategy relies on the idle air being supplied by the IAC. I then pressurized the system, ran the air out etc. Leaving work today after car had been sitting for 7 hours, I started it and pulled up to the light, about a couple hundred feet away from my parking space. My sisters 1994 3. A vacuum leak can also cause the engine to idle at a higher than normal rate, around 2,000 RPMs or higher. Information that addresses safety, reliability, performance and comfort related problems with Ford Mustang V6-232 3. now the car idles extremely rough doesnt. - Mustang Monthly. Red exterior w/ tan vinyl interior. I've taken it to a mechanic and ran a diagnostic. The TPS itself is simply a linear variable resistor that when driven by the ECU produces a linear voltage in a 0-5 volt range, 0 volts being idle and up to 5 volts representing. The ECU and/or PCM is a very important module in any car and we are the experts at testing and repairing them. When I disconnect the MAF Sensor, the car idles up and down. Car will shake. Vehicle may idle rough and stall. Free Shipping On Orders Over $49. Reconnect the plug on the idle motor 7. Drove nearly 600 KM no problem over 2 days - car drove like a dream. hi all, i am having rough idle problems with my 4. Compare 1994 Ford Ranger Throttle Position Sensor brands. Red exterior w/ tan vinyl interior. Engine just shut down, leaving consumer with no control of the steering/ abs system. I have a 98 v6 Stang, pretty much bone stock, with just the CAI and a 40 series Flowmaster 103400 miles. Seems to be pretty normal amongst alot of F150's. Page 1 of 7: How to Test the Coil Pack (Ford 3. - Mustang Monthly. 0 Engine Problems. My 1500 Silverado truck runs rough cold and misfires cold but runs fine warm. No scan tool is needed to troubleshoot and test the Mustang TPS and this article will show you how to get it done. Car (or truck or mini-van) seems to run ok above 30 miles and hour but once you come to an idle, the engine barely stays running and/or idles rough. Once it runs for 1 minute it seems totally fine. so he changed plugs ,wires ,and coil. I completed the head gasket/intake manifold gaskets on my 96 Camaro. 8L 3800 v6 engine. Leaving work today after car had been sitting for 7 hours, I started it and pulled up to the light, about a couple hundred feet away from my parking space. Seems to be pretty normal amongst alot of F150's. Installing them without degreeing, or degreeing them will not change the idle quality as the LSA cannot be changed. Run the engine until it reaches normal operating temperature. so i have a 2005 ford mustang v6 automatic transmission with 95k on it in florida, united states of america. Repairing the vehicles original computer is almost always a better option. Stalling 2002 V6 Mustang (Auto) Posted In V6 (1994-2004). For the best viewing experience please update your browser to Google Chrome. 6L V8 Mustangs, including the GT, Bullitt, Mach 1 and SVT Cobra models, as well as 2001-2004 3. what else could it be?. Buy a 1998 Ford Mustang Idle Control Valve at discount prices. 0 had a cold start problem also, it was the o-rngs in the upper intake. If the idle is rough or wont stay running your Idle air control motor will need replaced. Circuit Descriptions Of The Ford MAF Sensor's Connector. This might be a viable alternative IF you can find a good used low-mileage 4. Apparently this is something the 4. Mass Air Flow Sensor Cleaning, IAC Valve, Replace Coil Packs. Ford Mustang owners have reported 34 problems related to engine stall (under the engine and engine cooling category). Rough Idle And Loosing Coolant? Sketch 1998 v6, no fan and now a/c. The Ford Mustang, with the 4. Get Your Ford Mustang Idle Air Control Valve from AutoZone. it seems to be problem with 3. No scan tool is needed to troubleshoot and test the Mustang TPS and this article will show you how to get it done. )When you spray Mass Air flow sensor cl. I was curious and investigated. I checked everything and everything seems to be secure and in place. Leaving work today after car had been sitting for 7 hours, I started it and pulled up to the light, about a couple hundred feet away from my parking space. it has been in the shop for a week already and they can not figure out what it is doing. , Drive, 2, or 1? This doesn't sound too good folks. problem has been going on for a long time and we can. If you're looking to boost the power output on your Mustang, one of the first mods usually is a Cold Air Intake. The car sputters, idles very low and then slowly picks up to a normal rpm. Genuine Ford Part. 1998 ford mustang 3. I had asked the dealership about the idle drop not to long after I bought it (new), but they said it was normal. Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned. Research, compare and save listings, or contact sellers directly from 2623 Ranger models in Independence. 1999 Ford Explorer Won't Idle: Engine Mechanical … 1999 FORD EXPLORER WON'T My 2004 ford explorer 4 0l will not idle on its own only way to keep it running is to keep the gas pedal 2000 Ford Explorer Won't Ford explorer will not idle - Maintenance/Repairs - Car … out of the blue my 2001 ford explorer xlt will not idle. Driver & Passenger seat torn, no radio. Repairing the vehicles original computer is almost always a better option. For this reason we have come up with a Troubleshooting Guide to help you out. It may stay on for 5min-10min then turns off, during this time the engine runs rough at idle or at speed. 6L 4V Engine. 2005 ford mustang rough idle was created by stwarrior23 So im new to this forum, but have been to plenty of mustang forums with this problem. 1998 ford mustang v6 at idle engine (every 6 seconds ) increases idle speed from about 700rpm to 1300 rpm for a bout 3 - Answered by a verified Ford Mechanic. I have a 98 v6 Stang, pretty much bone stock, with just the CAI and a 40 series Flowmaster 103400 miles. Check to see if the valve is functioning properly by physically examining it. could it be a sensor ? The most likely sensor to fail is the Transmission Range Sensor. smoother Find the answer to this and other Ford questions on JustAnswer refer to COMPUTERIZED ENGINE Cold Air = Rough Idle - F150online Forums Oct 10, 2011 · Cold Air = Rough Idle. Checking the engine code only turns up 1222 (Lambda Control) which has been in the ECU for the last 1-1/2 yrs, I suspect the MAF is going bad but the check engine light always shuts off before I can check the code when this issue presents itself. 0s needing a idle re-learn. 0L V6 Honda Accord models describes a. 89 Mustang LX, rough idle and runs terrible. A vacuum leak can also cause the engine to idle at a higher than normal rate, around 2,000 RPMs or higher. so he changed plugs ,wires ,and coil. I have a mild E-303, ported TFS heads, Holley intake and a 70 mm throttle body. Idles a bit rough but not too bad. However, the most likely causes come from the basic operating components that control fuel and ignition. If you have any questions about your V6 Mustang or just want to connect with other V6 Mustang owners around the world, you have found the best place on the internet to do that. Mine usually stops whining around 20pmh. 150 KM and parked in public car park, car ran fine. I've just eliminated the leaks that the car once had by replacing the lower intake gasket. 32 degrees or below). I changed the throttle body on my 2005 Mustang GT to a BBK twin throttle body. 8 v6 automatic that will idle rough when cold then when warm idle somewhat okay. had tune up changed battery had it checked by 4 different mechanics they don't know what it is. Page 1 of 7: How to Test the Coil Pack (Ford 3. It doesn't help that it idles so low (about 580 rpms seems about average). Menu Recent Posts. Squeely belt when reved, Alternator Pully?? interfearence in sterio, When driving down the road, I can hear the subs beating even with sound OFF and Sub Selected OFF on deck. Vehicle may idle rough and stall. com) submitted 52 minutes ago by Mitchel-Skater. The idle air control motor (IAC) controls changes in idle caused by engine load. It turned out to be the throttle sensor connector, managed to remove some almost chrome flake looking stuff off the make connectors! Tightened it all back up, and threw it on. Testing P0301, P0302, P0302, P0303, P0304, P0305, P0306. help they say there are no leaks maf sensor is clean, alternator is good car is not over heating, fuel filter is not clogged. We treat our customers like family before and after every sale. 8L 3800 v6 engine. It seems like a long and complicated list doesn't it? Well, don't worry one of the most important things you need to successfully diagnose the misfire or rough idle on your 2. This valve is comonly called the idle motor, the IAC (idle air control) or the IAB (Idle air bypass). I couldn't find anything anywhere on the internet that would say whether the 2002 SS LS1 has a performance cam. My check engine light just came on when I'm in drive but stopped, my truck will have a very rough and shaky idle (like it wants to die or something). No code was set, but she ran terribly, with no power, major misfires, and an occasional backfire. Also please check out the statistics and reliability analysis of Ford Mustang based on all problems reported for the Mustang. Re: who all has rough idle in a 3. 4L equipped vehicle has 8 fuel injectors and when one or more go BAD, they will cause a rough idle / misfire condition that will set the dreaded misfire codes: P0300, P0301, P0302, P303, P0304, P0305, P0306, P0307, P0308 and fuel injector Codes:. Got rid of the p0171 and p0174 when I changed lower manifold gasket. Tune Required vs No-Tune Required Mustang Cold Air Intakes. No matter what you're driving, we have the right 2002 Jeep Wrangler for your vehicle. So I cleared it by removing the (-) battery lead and the next day it felt to be running rough and on the way home from work the check engine light came on. Registering is free and easy! Hope to see you on the forums soon!. Sometimes it runs rough at idle, if it's not running rough at idle it will run rough when put into drive. Engine just shut down, leaving consumer with no control of the steering/ abs system. tsb list for the 1998 ford mustang. The throttle body butterfly valve is designed to allow only a very small (if any) air to pass. It doesn't help that it idles so low (about 580 rpms seems about average). Choose top quality brands API, Delphi, Forecast, Hitachi, Motorcraft, Ramco, Replacement, Standard Motor Products, Walker. Denso Upstream O2 Oxygen Sensor for Ford Mustang 2. Run the engine until it reaches normal operating temperature. 0 lx with auto trans. for a 2004 mustang gt with lower miles its. 1998 ford mustang 3. It's generally located on the throttle body and in the case of my 2000 Dodge Ram 5. A vacuum leak can also cause the engine to idle at a higher than normal rate, around 2,000 RPMs or higher. Stalling 2002 V6 Mustang (Auto) Posted In V6 (1994-2004). 3 engine diagram,2002 jaguar s-type 3. Hey guys!! I just need a little help with this codes. Thanks Steve, for that draft of the dissertation on how to fix idle/stumble. For the best viewing experience please update your browser to Google Chrome. 1998 mustang v6 originally and auto that I’ve swapped to a t5. Cars need maintenance, there's no question about that. 2001 Mustang 3. Research, compare and save listings, or contact sellers directly from 2623 Ranger models in Independence. Are you plagued by misfires, hesitation, rough idle, poor fuel mileage? Spark plugs are usually the overlooked culprit. Overview If you've stumbled upon this site, you probably own a 2001-2004 Ford F150 with the 4. The fuel injected Mustang uses a small motor/valve assembly that allows a specific amount of air to enter the engine to control it's idle. 0 lx with auto trans. The above diagnostic strategy is the one that I have used with a lot of success and it should also help you too. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. 0-liter V6 borrowed from the Ford Explorer. Put gear shifter in "P" (Park), turn off all accessories. My 1994 Town & Country (3. It is a common suspect in contributing to rough idle. The Ford Explorer is known for a rough idle, engine stalling, loss of power, and misfires, accompanied by the check engine light. You may have to register before you can post: click the register link above to proceed. , Drive, 2, or 1? This doesn't sound too good folks. The fuel injected Mustang uses a small motor/valve assembly that allows a specific amount of air to enter the engine to control it's idle. Ford Mondeo V6 1999 PWM Gas Switzerland Ford Mondeo/German 1998 PWM Gas Germany Ford Mustang 1997 PWM Gas USA Ford Mustang. Apparently this is something the 4. This OPR EGR Vacuum Modulator is a direct fit replacement for 1998 to 2004 4. 8 mustang runs rough. Founded in 1988, Steeda is the leader in Ford performance products specializing in the engineering and manufacturing of parts for the Ford Mustang, Fusion, Focus, Fiesta, and Ford Trucks. 8 mustang automatic and I have a problem. Log in / Register. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. 3 4 cyl lx idle problems; timing; mustang 71; 98 mustang gt. You're tooling along on your way home from a cruise night or a car show when you pull up to a stop sign. ROUSH Crate Engines are high-performance engines that are based on and operate like the engines designed and produced in the 1960s and later. APDTY 112537 Electronic Throttle Body w/Actuator & IAC Idle Air Control Fits 2011-2012 Ford Edge / 2011-2013 Ford Explorer V6 / 2013 Ford Flex V6 / 2011-2014 Ford Mustang V6 / 2011-2013 Ford F150 V6 / 2013 Ford Taurus V6 / 2013 Lincoln MKS MKT MKZ V6 Revi. Restarted still just as rich and just as rough. for a 2004 mustang gt with lower miles its. Featured How-Tos. It takes a few s. It was running rough, missing and backfiring plugs were trashed. All fixed, the car idles better than it EVER has!. If you - Nissan 1998 Maxima question hence the rough. Here we have a large selection of quality gaskets and seals that are available to fit all “New Edge” SN95 Ford Mustang engines. Apparently this is something the 4. Let's say I'm in 1st or 2nd gear, accelerating normally, and then I floor it, I feel LOTS of hesitation and a pop or 2 (not a backfire) from the exhaust. 0 SOHC 4x4 XLT). A visual inspection under the hood with the engine running revealed sparking at the ignition coil near the #3 spark plug wire. cold start stall, cold rough idle concern. for a 2004 mustang gt with lower miles its. Seal those parts right once and for all. Get full 1985 Ford Mustang V6-232 3. Back to the Tech Page. 8L VIN 4 SF Service Bulletins TSB Number Issue Date TSB Title 03-14-8 JUL 03 A/T - Cooler Flushing Service Tips 03-14-4 JUL 03 Ignition System - Engine Misfire Diagnostic Tips 03-11-6 JUN 03 Electrical - Wiring Soldering/Crimping Tips. 2001 Mustang 3. The most recently reported issues are listed below. Anyone who owns/drives one of these trucks is very likely to come across the dreaded P0171/P0174 service engine soon light. Your source for all Modern Mustang news and discussion forums. Comp Cams 05-09 GT MuthaThumpr Cams- Very Rough Idle, Largest Cam that will work with Stock heads- BIG CAM , Helvetica" size="2">MUTHA' THUMPR - Very rough idle, biggest cam for stock heads. Hey guys!! I just need a little help with this codes. Top 10 Causes of a Rough Idle | JL Motorworks. Crower Camshafts for your 1994-2004 Mustang GT at RPM Outlet. Today we will be showing you how to replace your factory throttle body on any 2005-2010 Mustang GT. 96 Camaro 3. It used to stay at 500 but recently has been acting up. Information that addresses safety, reliability, performance and comfort related problems with Ford Mustang V6-232 3. During idle it will every few minutes start to stumble as if it is going to stall. Still receives the hitts/ I could stomp on floor and it plays the stomp?. I need help with my 1999 3. Rough start up idle after dynotune. rough idle until I spray Mass Air Flow Cleaner in the throttle control body 22 Answers. When your AC compressor kicks in or power steering is activated as you suddenly turn the steering wheel, the sudden drag o. Went back to car after 3 hours - car started but stalled immediately. Buy a new Idle Air Control Motor for all 1996-2001 GT Mustangs Built Before September 5th, 2001 from CJ Pony Parts. 0L (1979-1995) Mustang Power Stroke Diesel - Power and Pride The significant reduction in Power Stroke ® Diesel noise and vibration 7. Oil drips, rough idle, vacuum leaks, water and steam in your 1999-04 Ford Mustang tailpipe are all signs that you have a potential gasket problem. I need to get a service manual for it and fix 1996 chevy 305, p0306. I started it and it shot up to around 2500 rpms or 3000 rpms but then it would bog down real low past its normal idle frequency and it would sound like it was gonna stall. Thanks Steve, for that draft of the dissertation on how to fix idle/stumble. Resist the urge to adjust the TB set screw for low idle concerns. 4L SOHC MODULAR (2 VALVE) Engines. there is a terrible vibration in the motor that can be felt through the whole car , the higher you rev the worse it gets -- i was told that i. timing marks on 1969 302 for mustang; 1983 Mustang V6 232 stalling HELP! 88 mustang 2. Reconnect the plug on the idle motor 7.