This is information on how to set your idle rpm. We offer vehicle-specific IAC valves designed with your make and model in mind, whether you're looking for an idle air control valve for Nissan Altima or a Ford Focus idle air valve. System running lean/rough idle 1999 3. ️Ford Mustang V6 V8 Mach1 Idle Issue Fixed ️Ford Idle Fix ️Ford Engine Loses 01. com! We are the oldest and largest V6 Mustang forum on the internet. I have had the codes run at a local store and it came up with both a lean and rich condition on bank 2. Comp Cams Xtreme Energy Camshafts for your 1996-2002 SVT Cobra at RPM Outlet. Throttle Position Sensor TPS. 7-liter V-6 engine makes 305 hp at 6,500 rpm and 285 lb-ft of torque at 4,250 rpm, and is guaranteed to get 30 miles per gallon on the highway, or 480 miles per tank. It idles normal in park but in drive with my foot on the break it idles rough. You may have to register. 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. 9L V6 engines of the 1999 to 2004 base model Mustang, they lack a little bit of the juice their big brother V8 offers. This was a few months ago and I got a cylinder #1 misfire code. The connector you pull that doesn't have any effect on RPM is the bad one. through the seat pedal, steering wheel, etc. But im wonder who has it, or who did what to fix it, im thinking seafoam and new plugs might do the trick. , while stopped with transmission in Drive…. Follow these steps to complete an Idle Relearn: With vehicle at a complete stop, set the parking brake. System running lean/rough idle 1999 3. 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. The car idles very rough at low idle (e. Call (Or Text) us now !! Call (or text) ☏ THM Auto Center 3420 Fulton Ave. This company is not yet accredited. what could be the problem?. Rough idle after shifting into gear ,also I have no passing gear power. 2L V6 Oem Fit IAC267. 0 V6? Answer. could it be a sensor ? The most likely sensor to fail is the Transmission Range Sensor. I have read several forums on this and was told it was the coolant sensor. The Ford Mustang, with the 4. Start pulling coil connectors. 8L V6, can be easily tested in three simple steps and using just a multimeter. eventually it will warm up and the backfiring will stop. Any assistance greatly appreciated. I have a 01 mustang v6 manual and it idles high when first starting and in between shifting can anyone help - Ford 2001 Mustang question Search Fixya Press enter to search. It only takes a minor problem like a fouled spark plug to cause your engine to vibrate. Ford Mustang owners have reported 43 problems related to automatic transmission (under the power train category). Engine rough idle problems arise because car engines are demanding. 7L V6 - BBK Premium Exhaust Header Gasket Set. The hose that connects the plastic pipe to the idle air control will degrade over time and leak or worse restrict air flow to the iac causing rough idle. 88 Ford Ranger runs rough at idle by Brad: I have a 1988 Ford ranger 2wd with the 2. This only happens when I have the air, or defrost on. 2004 - 2008 Ford F150. First time in shop, they replaced EVAP hoses, purge valve, and purge sensor (Car had a P1443 that was resolved with their fix. I have a 2001 Audi A4 1. But after a little while the idle starts surging. When this happens it is sometimes necessary to perform an idle relearn to once again teach the car how to idle correctly. pg 158-159. 2011 Ford Mustang V6 Premium 2dr Fastback Coupe RWD Drive it home today. The idle is real rough and when you step on it you get that sputtering, however sometimes it will start to sputter then for no reason what so ever go like theres no problem. I ran it through 2 more tanks with seafoam just to make sure and it continued to rough idle. In order to list items in this forum you must be an Mustang Evolution Commercial member. Genuine Ford Part. My sisters 1994 3. It is attached to your plennum either bolted on or its attached with a hose. and it still idels rough. When a Ford Focus exhibits problems with running roughly at idle speeds, auto mechanics generally look first to either a vacuum problem, or more often, a problem with water getting into the Differential Pressure Feedback Sensor (DPFE), a part of the EGR (exhaust gas recirculation system). Could the tune have caused my truck to start idleing rough?. 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. 0's, i got a really rough idle in mine, it almost feels like a misfire. The exhaust note can also use a bit of work as well, depending on what you're going for. 01 2001 Ford Mustang Idle Control Valve 3. It will also stall at idle at times. Below are the four most common. Added geometric mean of idle voltage. 0L was rated at 210 horsepower and 240 lb-ft of torque. Q: my 2001 3. 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt) - Mustang6G. The 2010 Ford Mustang has 1 problems reported for stalling/rough idle. Most likely a bad ignition coil. 1% at idle and when driving, was causing stalling and rough idle and jumping at high speed. The Ford Mustang, with the 4. Curing Rough Idle. Rough Idle,no power, Codes OIl leaks. 7L V6 - BBK Short-Tuned "Shorty" Headers (Silver Ceramic) Your Price: $429. 99 2011-2016 Mustang 3. Discussion in '1st Gen. But im wonder who has it, or who did what to fix it, im thinking seafoam and new plugs might do the trick. The Mustang 4 model is a Coupé car manufactured by Ford, with 2 doors and - seats, sold new from year 2001. The idle is rough, but I go on my way (seems to run fine otherwise, I don't think I am harming the car). TheTunerdude 134,482 views. 1994-2004 Mustang Idle Air Control Motors. And there's a ticking sound that my car makes when it warms up in the morning. I've always thought that by simply raising the idle speed about 100 rpms would help a lot. 8L V6, can be easily tested in three simple steps and using just a multimeter. 9 rough idle/wot IP: Logged Message: I've never owned a dodge so i have no idea what the common problems or what to check but just picked up a 01 3. The engine in your 2004 Ford Mustang should be running when you perform a transmission fluid level check, otherwise it will be inaccurate. it is having a hard time starting and idling when first started, after it warms up it runs fine, except when i come to a stop at a. 0's, i got a really rough idle in mine, it almost feels like a misfire. 2004 - 2008 Ford F150. If your vehicle is suffering a rough idle condition (after replacing the spider or fuel pressure regulator), take a look at the section: Spider Fuel Injector Assembly O-ring is Not Leaking Vacuum, What Next?. Reconnect the plug on the idle motor 7. Buy a new Idle Air Control Motor for all 1996-2001 GT Mustangs Built Before September 5th, 2001 from CJ Pony Parts. 8 V6 manual with 160k miles. The engine runs rough at idle and starts to cut out at @3000rpm. and pull the trouble codes. 7L V6 - BBK Premium Exhaust Header Gasket Set. When the battery is disconnected, a new battery installed or a tune is loaded, the engine must relearn its idle and fuel trim strategy for optimum driveability and performance. I have a 01 mustang v6 manual and it idles high when first starting and in between shifting can anyone help - Ford 2001 Mustang question Search Fixya Press enter to search. Product Description This is an idle air control motor (IAC) for your 2002-04 Ford Mustang GT 4. From: Message: Doug Dodge Dakota JOIN HERE 10/29/2011 10:08:35: Subject: 01 3. 0L was rated at 210 horsepower and 240 lb-ft of torque. Jun 01 2008. Maybe my car will stop jerking when i accelarate uphill. 5) The car then stalls out after some short sputtering/rough idle and it won't start again. 8L Mustang aggravating idle issue - Sorry for the long post but there is a lot to the story. we are both lost. I find my car idles quite rough on a cold start up (ie when car has been left overnight) It is recommended that there is no need to warm up our cars for too long so I let the car idle (in Park) for 1 minute then take off. It is attached to your plennum either bolted on or its attached with a hose. The Ford Mustang, with the 4. Have you had any luck figuring out the problem as i dont even drive as i get so stressed everytime i go out in it and im making monthly payments on it. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more!. The Mustang 4 model is a Coupé car manufactured by Ford, with 2 doors and - seats, sold new from year 2001. 80 Johnson outboard stalls out in idle; 99 Johnson 200 efi rough idle; a compression tester shows 4 bar when i idle per piston; correct way to adjust idle mixture on outboard; Johnson+115+hp+idle+speed+adjustment; factory setting Johnson idle mix; how to adjust idle stop screw on an Johnson outbaord motor; how to change idle on a Johnson 50 hp. autodr your post is very precise. Reconnect your battery's negative terminal. There is a lack of power and sputtering with a miss when driven, most of the time. asking $900 or best offerPlease feel free. Also service engine soon light comes on when below 1/4 full but goes away after fill up. As soon as I put the car in gear (in Drive) the car vibrates quite bad. Reconnect fuel line and the fuel pump relay. What causes a rough idle? A rough idle can be caused by many different car faults. it seems to be problem with 3. The idle is real rough and when you step on it you get that sputtering, however sometimes it will start to sputter then for no reason what so ever go like theres no problem. While we all appreciate the 3. Based on the 2001 Mustang GT, the limited-production Bullitt featured a 4. 3L equipped Ford Mustang or Ranger (Mazda 2300) can seem quite daunting since you have 8 spark plugs and two coil packs to deal with. 8L //// Engine Vehicle Shakes entire front end of car when at idle, all the way up to 2,000 rpms then it goes away. Throttle Position Sensor TPS. What is the idle set at? It seems like the idle was high before the PCM learned the trims then dropped down and you noticed it running rough. 1994 mustang gt misfire: Engine 1994 mustang gt Rough idle, misfire under acceleration: Weird idle or when engine hot running. 8L V6 : this is exactly what I needed to take care of my rough idle problem. Follow these steps to complete an Idle Relearn: With vehicle at a complete stop, set the parking brake. 9L V6 engines of the 1999 to 2004 base model Mustang, they lack a little bit of the juice their big brother V8 offers. 8 mustang runs rough. Fix a surging or rough idle in your 1994-2004 Mustang with a direct replacement idle air control motor. I did the usual and got some new premium fuel in it and added cleaner. 2002 Ford Ranger runs rough at idle but no OBS code? My 2002 Ranger runs rough at idle. If your vehicle is suffering a rough idle condition (after replacing the spider or fuel pressure regulator), take a look at the section: Spider Fuel Injector Assembly O-ring is Not Leaking Vacuum, What Next?. It would get up to temp then drop to -40c, it was faulty I got a new one and it fixed the issue. com! We are the oldest and largest V6 Mustang forum on the internet. during the warranty period the dealer replaced MANY items without luck. 2005 mustang that has throttle body heater box will have to be trimmed at the bottom edge to clear metal thermostat housings. on acceleration the engine will not have power and will backfire. There is a lack of power and sputtering with a miss when driven, most of the time. 01 Pathfinder Engine runs rough & shakes. Though we all love our mustangs, from time to time they needs repairs that we might not know about. Comes with o-rings for bottom of lower housing, thermostat o-ring, and temp. If you do not allow the engine to relearn its idle trim, the idle quality of your vehicle may be adversely affected until the idle trim is eventually relearned. I cannot get rid of the code. The Ford Mustang, with the 4. The engine runs rough at idle and starts to cut out at @3000rpm. I would check it out;the part is about $35 and is easiloy replaceable. The idle air control motor (IAC) controls changes in idle caused by engine load. Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > Engine Tech Forum > 6-Cylinder Tech > 3. have the OEM manuals volume 1 & 2. Still did not fix problem, now if you unplug most of the sensors no check engine light comes on or change to the engine. Put gear shifter in "P" (Park), turn off all accessories. 0L Ecoboost Escape at 30k because the idle was a little rough, checked the gap and it was way outta specifications. Call (Or Text) us now !! Call (or text) ☏ THM Auto Center 3420 Fulton Ave. So far as the rough idle goes, (I cant say about the speedo) I'm going to hazard a guess you have a problem with the Idle Air Control Valve or some call it Idle Air Motor. Discussion in 'Grand Cherokee, Durango, Jumped it so I was aware of the rough idle when I bought it. Categories: American Classic Cars | Muscle & Pony Cars. I think that is what I am going through right now, my idle is 650 and I think I'm going to raise it to 700 to start then go from there. The bad idle seems most frequent with the car in drive with foot on the brake, sitting at a stop. This covers year models 1986-1993, and 1994-1995. My 2001 mustang is idling high, engine size is a 3. However, the most likely causes come from the basic operating components that control fuel and ignition. 8L Idle Surging Problems Okay first off I'm not a mechanic so if you could dumb down your help it would be greatly appreciated. The rough idle is still noticeable when the XC is in Park. Also please check out the statistics and reliability analysis of Ford Mustang based on all problems reported for the Musta. There is a lack of power and sputtering with a miss when driven, most of the time. Often you do not know how to make the thermostat housing fit. 8 V6 manual with 160k miles. on acceleration the engine will not have power and will backfire. checked throttle position with scanner showed range of 9%-43% at idle. 0's, i got a really rough idle in mine, it almost feels like a misfire. Diagnosing the cause of the misfire (rough idle) on a 2. At a cold start up the engine appears to run rough, almost like a single cylinder is misfiring but no codes are being thrown or stored. 99 2011-2016 Mustang 3. TheTunerdude 134,482 views. Low pricing and fast free shipping on Crower Camshafts and Springs. I went ahead and changed just the 1 cylinder spark plug and rough idle went away. 3L with 100K miles on it. See 2015 Ford Mustang technical service bulletins (TSBs) at TrueDelta, organized by model year and problem area. so he changed plugs ,wires ,and coil. only problem it gets into is when it idle for 8 to 9 minuts it loos it,s synchronization and idle rough and cut off. The idle is real rough and when you step on it you get that sputtering, however sometimes it will start to sputter then for no reason what so ever go like theres no problem. After replacing these, upon start up it rough idles and sputters pretty badly. You guys seem to know ur stuff, try this one out; couple of problems need answered asap; Po171 po174; 1998 Ford Mustang Stalls Out; 1998 Mustang V6 engine knocks and runs rough; 95 Mustang 3. Why does my 1999 ford mustang engine idle rough? I am having the same problem, and poor acceleration!! No , the 1999 Ford Mustang came with the ( 3. 0 sohc v-6 on my '01 explorer sport, 2-wheel drive. 2000 Mustang Recalls Engine Surge/Rolling Idle/DTC's Set 02-21-13 OCT 02 Engine - Cylinder Head Straightedge Surface Check Bulletins for 2000 Ford Mustang V6. Most likely a bad ignition coil. 6 when cold it idles fine after warm up it has a rough idle just enough to notice and make you want to fix it it runs good no missing or lack of power so i pulled throttle body it was a mess cleaned it with tooth brush and sea foam deep creep to keep from messing up coating and no luck i hope someone here could lead me in the right direction on how to fix the idle problem thanks. 8 mustang runs rough. Hey guys, I cant seem to search and find a specific dealing with my issue. The reason that the plant is going idle is because this is not a particularly good pairing; a reduction in Fusion demand isn’t likely to correspond to an increase in Mustang demand, or vice versa. Other than this everything seems to be running very smoothly. 8 liter V6 engines. Ford Mustang Rough Idle BoostedWhipz. This forum is for commercial members to post their Mustang related information. For your Ford Mustang, try cleaning out your idle air control valve. Here is a tech tip. secondly if i leave vehicle hot and return after 5 to 12 minutes it idle rough,but if i let it cool little more then it starts ok. 9v6 po300 01 IP: Logged Message: i had my check engine light come on and it showed po300 and po 301 it said multiple misfire on 1 and 5 clyinder changed spark plugs still idles rough: TimG Dodge Dakota JOIN HERE 5/04/2009 20:03:49: RE: misfire v6 3. , while stopped with transmission in Drive…. I have a 97 runner 5vz with 192,000 on the clock. Ran a can of seafoam and the engine felt a bit more stable but not 100%. He found arcing from plug wires and coil. 5) The car then stalls out after some short sputtering/rough idle and it won't start again. Damage to the car’s carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. 3) Then, you tried to restarted the motor, it cranked, sputtered to life, idles really rough as if it had a super lopey cam but in fact it was probably struggling at 300-400RPM 4) You notice smoke out the tailpipe, the engine sounds like something is wrong. could it be a sensor ? The most likely sensor to fail is the Transmission Range Sensor. The Fusion and Mustang aren’t particularly complementary. 2002 Ford Ranger runs rough at idle but no OBS code? My 2002 Ranger runs rough at idle. This company is not yet accredited. New problem, no codes thrown. Save up to $11,748 on one of 7,640 used 2011 Ford Mustangs near you. It doesn't help that it idles so low (about 580 rpms seems about average). rough idle, engine dies 5 Answers. When this code occurs this is more of a camshaft VCT solenoid stuck in position. This company is not yet accredited. 8L V6 2000 Motorcraft (Fits: Ford Mustang) 5 out of 5 stars 2 product ratings 2 product ratings - Idle Air Control Valve For 1999-2001 Ford Mustang 3. The 2001 Cobra Mustang included a independent rear suspension system, raising the standard for muscle car performance. - Mustang Monthly. A tidle, the RPMs are going for 900-700-900 over and over continuously (very rhythmic I might add). Once the CEL comes on, it runs fine (albeit the slight loss of power do the ECU going into limp mode to correct the problem). I gather this is related to the idle air circuit. 8L V6, can be easily tested in three simple steps and using just a multimeter. Mine is rough. starts out fine but within in about 30-60 seconds from start when cold it starts to shake. What Parameters Do I need to Datalog (99-04 Mustang ALL) 99-04 V6/GT/Cobra: Please select the following PID's/DMRS (do not select any SAE (OBD) parameters) and ensure Rapid Pack Datalogging is selected. The Ford Mustang is reinvented once again, revealed to the public in new form on September 3, 1998. Idle Air Control Valve MOTORCRAFT CX-1732 fits 1999 Ford Mustang 3. Also new was the interior, "COBRA" marked in the rear bumper and the same spoiler used on both the V6 and GT models. I am so frustrated as now im being told it has to do with summer and winter gas that the companies use and it apparently boils in the car. 2004 - 2008 Ford F150. Added geometric mean of idle voltage. I will follow up on driveability and warm idle speed but for now it seems like a feasible option for those who are concerned with higher cold idle RPMs. What is the idle set at? It seems like the idle was high before the PCM learned the trims then dropped down and you noticed it running rough. For this reason we have come up with a Troubleshooting Guide to help you out. Showcasing our full group of Idle Air Controller for sale now!. 0's, i got a really rough idle in mine, it almost feels like a misfire. Sometimes even almost coming to a stall, but never cuts off, but when it does that, it revs up high for a second, and then goes back to normal. However after driving at 70 mph for about 30 mins on my way home from work it no longer idles rough. 8 V6 manual with 160k miles. 5 lb/m, running rough or smooth so I don't trust the scanner. Again, start the engine and compare how it is running at a stop to how it normally runs. Rough Idle,no power, Codes OIl leaks. The connector you pull that doesn't have any effect on RPM is the bad one. When this code occurs this is more of a camshaft VCT solenoid stuck in position. The Ford Mustang is reinvented once again, revealed to the public in new form on September 3, 1998. I have a 66 mustang with a 200 straight 6. When Just siting after that it'll rough idle occasionally and it makes a spitter noise. Have you had any luck fixing the cold start issue? I have the same problem that when i start my car, it idles horribly likes its only hitting 2-3 of the cylinders, however when you give it a small rev, the problem goes away. I have a 2001 4 cyl Camry with about 147K. These easy to install IAC motors improve idle quality in your GT, Cobra, Bullit, and Mach 1. I have encountered a rough idle condition on just about every vehicle from a Ford F150 or a Jeep Cherokee all of the way to a Geo metro. The Ford Mustang is an iconic American sports car that first debuted in 1964. I have had the car into the dealer twice after I failed to diagnose the issue. Pay attention to low idle or stalling. 9 rough idle/wot IP: Logged Message: I've never owned a dodge so i have no idea what the common problems or what to check but just picked up a 01 3. 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. Adjust each carb to best idle + 1/8 to 1/4 turn, ideally, adjust out on the water a blade width at a time each, just until any throttle hesitation is gone. I have read several forums on this and was told it was the coolant sensor. Let the people with 12+ years of experience in finding and buying car parts help you find the best Idle Control Valve for your Ford Mustang. Wiki User 02/19/2010. 2011 Ford Mustang Engine 2011 Ford Mustang Most importantly, the new Duratec 3. We here at Auto Parts Warehouse want to make sure you're happy with your car part purchases. Idling problems on 2004 Ford Mustang 4. Why does my 1999 ford mustang engine idle rough? I am having the same problem, and poor acceleration!! No , the 1999 Ford Mustang came with the ( 3. 8L V6 Motorcraft. com! We are the oldest and largest V6 Mustang forum on the internet. Post Reply. Genuine Ford Part. Toyota Camry 2007-2011: Why is My Car Idling Rough? The Toyota Camry is well regarded for its overall dependability and longevity, but without proper maintenance, it can run poorly and idle with a vibration that can loosen tooth fillings. It will also stall at idle at times. Also please check out the statistics and reliability analysis of Ford Mustang based on all problems reported for the Mustang. problem has been going on for a long time and we can not figure it out. Buy a 2001 Ford Mustang Idle Control Valve at discount prices. 3L V6 car idles rough, shakes, backfires, and evetually dies. 8L V6 : this is exactly what I needed to take care of my rough idle problem. eventually it will warm up and the backfiring will stop. 01 Pathfinder Engine runs rough & shakes. I am so frustrated as now im being told it has to do with summer and winter gas that the companies use and it apparently boils in the car. during the warranty period the dealer replaced MANY items without luck. Components in the fuel, ignition, emission and other systems should work correctly. The following is a list of problem symptoms discussed in this guide: Engine Will Not Rotate; Engine Will Rotate But Will Not Start (Fire) Engine Is Difficult To Start When Cold. Here is a tech tip. 2004 - 2008 Ford F150. Nothing major, but kind of would like it to stop. 7L V6 - BBK Short-Tuned "Shorty" Headers (Silver Ceramic) Your Price: $429. SELLER & PAYMENT INFORMATION Idle Air Control Valve 01 mustang 3. Mass Air Flow Sensor Cleaning, IAC Valve, Replace Coil Packs. Not only that, but quite a few things can cause a misfire condition (or misfire trouble codes). 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. but on start up it tries to find idle after I clear the check engine light really rough idle until it gets to 1k rpm then. If you are installing a FRPP Manifold on your 2007 to 2010 Vortech/Paxton supercharged Mustang this will help. And when it comes to older cars and. i have an 05 ford f-250. 2006 mustang gt rough idle. hi all, i am having rough idle problems with my 4. Having a a major dilema with a rough idle / Multiple Cylinder Misfire on my 2001 Chevy S10. 10 Types of Truck. 2010 Mustang V6 CAI Running Lean Code. 0 Vulcan Tech Lots Of Problems Solved. Here is a tech tip. 5) The car then stalls out after some short sputtering/rough idle and it won't start again. have the OEM manuals volume 1 & 2. The GT however is much different than your standard V6. Would a vacuum leak affect idle as well or just the scenarios I've listed? I haven't yet checked the total advance, which I plan to do tonight to see if the vacuum and mechanical advance is operating correctly. Put new spark plugs and spark plug wiring and new fuel injectors and putting new. The vehicle may need to be driven 10 miles or more to relearn the idle and fuel trim strategy. 8l v6 lx, spuratic idle/carbon ect. pdf), Text File (. I though that the one or more injector(s) might be dirty or clogged. and it still idels rough. If definatly no spark. it will act up for a little while then it quits and goes back to running normal. Compression. Damage to the car’s carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. 1% at idle and when driving, was causing stalling and rough idle and jumping at high speed. runs rough 2000 mustang 3. so i have a 2005 ford mustang v6 automatic transmission with 95k on it in florida, united states of america. The car STILL has a rough idle. P0016 Camshaft position correlation Bank 1 Sensor A. Needs lower gears, exhaust upgrades, larger throttle body and mass air, bigger fuel injectors and a 2200+ stall with automatics. 2010 Mustang V6 CAI Running Lean Code. Idle Air Control Valve For 1999-2001 Ford Mustang 3. Idle Air Control Valve MOTORCRAFT CX-1732 fits 1999 Ford Mustang 3. 0L Rough Idle - Tried everything any more ideas? I have replaced, plugs, IAC, TPS, Crank Position Sensor, removed and completely cleaned throttle body (with sensors out). Nissan Maximas with a vacuum leak can idle very rough, like the engine is struggling while the car is stopped at traffic lights. Help my vx has been occasionally overheating temp gauge go right up and ecu beeps but then will drop back after a few minutes?? didnt seem too hot on the few times it has done soo and still seems to be plenty of coolant in radiator over flow bottle is empty though, got really hot this evening though steam coming from drivers side of rad, pretty sure its crack but is this my only problem, also. 8L 99-04 mustangs (as I understand it). 8L V6 Mustang - Occassional High RPMs - Unsolved 1 year problem 2001 Mustang Engine: 3. Just had this on th 06 v6 I just bought. Jun 01 2008. You may have to register. By comparison, the old 4.