Question about Cars & Trucks

Open Question

Sudden high idle while driving down the road

I have replaced the Idle air control valve, throttle positioning sensor and cleaned the throttle body. had it checked out with engine diagnostics machine which says there is nothing wrong. but it still will unexpectedly while driving down the road high idle to 3000 RPMS. to get it to stop. I stop shut off engine wait for a few seconds then start and go. it will run fine until it does it again .

Posted by on


5 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 314 Answers

SOURCE: Loping and high idle

You are really onto it! Either the TPS or the cable from the peddle. Do check the cable first. Frankster016

Posted on Oct 26, 2008

  • 5 Answers

SOURCE: 2500 to 3000 rpm idle

Change your Thottle positioning Sensor. My 93 lesabre did the same thing and i changed the TPS and it stopped.

Posted on Jun 25, 2009

  • 3640 Answers

SOURCE: 96 bonneville high idle when cold

check or clean out throttle body at throttle plate it may have carbon build up on it. also make sure air filter is clean and check or replace the intake air tempurature sensor.(iat) sensor. the sensor is under 20.00, the sensor is after air filter in the big hose to throttle body.

Posted on Feb 15, 2010

  • 2272 Answers

SOURCE: Driving down the road the engine will suddenly shut off.

Check the fuel pump and fuel filter.if the fuel is getting blocked due to dirt in fuel or clogged filter then the car will stop in between while driving because the flow of fuel will stop due to this dirt in the fuel.This has to be checked. There are many other possibilities that has to be checked in this case. 1)Sometimes the car will just plain stop running if there is a faulty/weak coil wire. 2)If your car has safety alarm system in it then this can be the other reason .in this case either the alarm needs to be disabled or the alarm needs to be replaced. 3)In some cases its the problem of ECU .it gets short or faulty due to electrical short circuit in the car. Also other common possibilities that has to be checked are. 1)The voltage of the battery .It should be exact 12 volt. 2)The condition on the alternator .if the alternator is weak or faulty it will not let the battery charged.when the car is running at that time the alternator keeps on charging the battery.if the alternator is faulty it will not charge the this has to be checked. 3) The other thing to be checked is the spark plug. and the coil pack.if the coil pack is weak or faulty it will not let the spark to come when you start the car. Also the other best option is to get the car scanned at car diagnosis diagnosis center you will receive the error codes of which part is faulty or weak in car , due to which the problem is occurring. At its free to get car scanned.they also deals in selling parts .so you can get the faulty parts replaced by their technicians. Thanks. you can rate this solution and show your appreciation.

Posted on May 17, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Why does my 94 Cherokee laredo idle high?

Vacuum leak, idle air control motor and solenoid, stuck throttle cable if equipped, throttle position sensor

Oct 02, 2016 | Cars & Trucks

2 Answers

1999 ford taurus rpm go up and down

Scan for trouble codes at local auto parts store. Possible Idle Air Control motor or throttle position sensor, or a big vacuum leak. Idle Air Control Valve Replacement

Jan 11, 2015 | 1999 Ford Taurus

1 Answer

I have a 2002 taurus idles high from 1000 to 1800 rpm's, 2-5 seconds when hot or cold then comes down to correct idle, happens on start up or driving. Suggestions?

chech engine light is letting you know that the idle air valve has been disconnected. looks like you have a bad idle air valve.

Aug 19, 2014 | 2002 Ford Taurus

1 Answer

95 taurus idling too high like it is stuck wide open

Several issues can cause this problem, either singularly or in combination.. Check the throttle body for dirt and sticky carbon deposits. clean the throttle body using a spray can carburettor/choke cleaner, and with the throttle valve held open, wipe out the bore of the throttle body with a solvent soaked clean rag. Make sure the throttle valve is not sticking any where in the throttle travel between closed and open.

Next, check the idle air bypass valve that is mounted on the top of the throttle body, for dirt and carbon deposits inside that can cause the idle air bypass valve to stick in an open position. Clean the inside of the idle air bypass valve with carb cleaner.

If the ignition timing is over advanced, (Specifies timing advanced is10 degrees Before Top Dead Center, with the in-line spark out plug removed from the spout connector housing, and with the idle speed set to the idle RPM shown on the emissions sticker under the hood, with the engine fully warmed up,) use a timing light to check and set the ignition timing to specification.

The throttle position sensor must be installed on the throttle body using the required method or the idle speed will likely be excessively high. Beginning with the battery negative cable disconnected from the battery, and with the throttle position sensor removed, place the sensor in position on the throttle body with the drive tabs on the sensor placed after the drive tabs on the throttle shaft, the holding the sensor on the throttle body, rotate the sensor counter clockwise to align the mounting screw holes in the sensor and the throttle body, Insert the sensor screws into the senor screw holes, into the threaded holes in the throttle body and tighten finger tight. Carefully center the sensor on the sensor screws, then tighten the screws firmly without over tightening. Reconnect the sensor electrical harness connector.

Inspect the throttle valve idle stop screw adjustment that holds the throttle valve open slightly, to prevent the throttle valve from touching the throttle body bore surface with the throttle closed, and the accelerator pedal unpressed.

Dec 30, 2010 | 1995 Ford Taurus

2 Answers

On a 3.5 engine code reads low idle? any idea


Jul 05, 2010 | Chevrolet Colorado Cars & Trucks

2 Answers

Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?

2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

Nov 09, 2009 | 1990 Jaguar XJ6

3 Answers

I got a 94 buick regal it has the 3.8 and it stalls mainly when i breack going up to a stop sign ask many people no one can help

The idle air control valve may be dirty with carbon and not working properly. You can try cleaning out the throttle body with two cans of throttle body cleaner, make sure you follow the instructions on the can and do not use carb cleaner. The carb cleaner is to corrosive to the gaskets used in throttle body's. Try to clean out the passage way to the idle air control valve at the throttle body. Once the throttle body has been cleaned and the instructions have been followed, you can reset the idle air control valve by turning the ignition keys to the on position for 30 seconds and then turn the keys to the off position then on for 10 seconds and then start. The engine may idle high then come down, wait for it to come down and idle for 1 min then go out for a test drive. that should fix the problem. If not try resetting the idle air control valve again. Good luck and keep me posted, most of the time it's a dirty or bad idle air control valve at the throttle body. 

Sep 04, 2009 | Buick Regal Cars & Trucks

1 Answer

I have replaced the throttle position sensor, egr valve, o2 sensors, mass air flow sensor, fuel system, and my 99 trooper idles high, and shuts off

Check the Idle accelerator valve located on front side of throttle body, it is either stuck or needs cleaning real bad, this is what controls your idle speed, by letting small amount of air in. It has a plunger on it that moves back and forth slowly to adjust amount of air mixture, it is controlled by computer. Unplug it and just turn on key and check for voltage.This valve gets real gummed up, probably need to take apart throttle body and clean. HUNT

Jul 12, 2009 | 1987 Isuzu Trooper

1 Answer

2500 to 3000 rpm idle

Change your Thottle positioning Sensor. My 93 lesabre did the same thing and i changed the TPS and it stopped.

Jun 11, 2009 | 1993 Buick LeSabre

3 Answers

Surging engine revs.

There is a recall on the engine computer for this problem

Jul 31, 2008 | 1995 Saab 900

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

14 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14398 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides