Question about 2002 Jeep Grand Cherokee

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Why does engine idles high at start up ! why does cruise control kick off ! Both started happening at same time !

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  • Jeep Master
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I would only suspect that the throttle position sensor has gone bad.

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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1 Answer

Gas pedal gets stuck and keeps the car going cant stop without turning the car off


dont drive it. find the cause and fix it now.
Hot and cold engine or BOTH>?
1995 Tracker, no tranny , no 4wd , on engine options stated.
Exact high RPM in neutral, not stated...... 1500 is normal cold.
keeps going in Neutral. (nah , you have 5 ways to stop any car.
key, hand brake, foot brake and neutral. and with 4wd, 1 more neutral.
keep that in mind driving any car.
this car has up to 3 throttle cables that can stick. and more!

1: floor mats hit the pedal>? ala. Toyota style (lawsuits)
2: the three cables are, throttle. , cruise and A/T transmission kick down cable. if car is M/T and no cruise it has 1 cable.
so disconnect it, throttle fixed? (disconn,. 1 by 1, bingo?

no cure?, then its not the pedal , you meant just high idle.
yes, replace the cable or bad parts three.
ok say its not the cables.. (tests proved that)
the 95 came with 2 engines, 8valves and 16valves,
they work differently (8v love so race, 16v loves to stall)

1: ISC Stuck open, common.
2: 8v, any air leaks at all , will cause super high idle speeds.
3: throttle valve in the throttle body is stuckopen (gunk) or the return spring broken (very very rare the latter,in fact never heard of one breaking)
4: IAC (thermal idle control stuck open ,(my 97 was). and lots more.
5: on the 16v it takes 2 failures. to make high idle.
gross rich running engine (cold engine its normal) and any air leak
once hot the engine can not race unless there is huge overfueling
and an air leak.
6: the 8v has this device on the side of the throttle body.
called a dash pot. its just a fast idle vacuum servo.
if stuck open the engine will scream full time....
7: ECU stuck in limphome, can cause too high idle speeds.

we need to know which engine
http://www.fixkick.com/find-parts.html
8v or 16v first.
then does the idle race hot or cold or both (engine temperatures)
if it races , then how fast?, RPM the dash tachometer tells you that.

it can be as simple as a 50cent hose cracked.
to a dead ISC. (idle speed control) IAC is thermal idle air controller.
the IAC must be closed on a hot engine,
if the the engine never gets hot,it will scream full time.

Feb 13, 2014 | 1995 Geo Tracker

1 Answer

Driving on the road the RPM goes higher wituout speedind


Check out related help links to troubleshoot these problem:----Click the link below:---Idles Fine but RPM jumps in drive mode?http://technoanswers.blogspot.in/2012/07/idles-fine-but-rpm-jumps-in-drive-mode.html
---------Mitsubishi Lancer rpm needle bounces?http://technoanswers.blogspot.in/2012/02/mitsubishi-lancer-rpm-needle-bounces.html
--------How to adjust rpm on 2009 dodge charger SRT8?


http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
---------
Engine cuts out at 3000 RPM?http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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High rpm in neutral? Inconsistant high RPM in neutral?http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Jetski Sputters and Low RPM? http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html

--------
Fuel Injection Problem And RPM suddenly increaseshttp://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html

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2005 Toyota Highlander: Engine runs hard RPM below 3000?http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html

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1987 Toyota Camry: RPM Drops going Up hills?http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html

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Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

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1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?


http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html

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1999 Toyota Camry: Erratic stalling and high engine RPM at idle?


http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html

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1995 Toyota LS: Misfire at idle or low RPMhttp://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html

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Lexus RX: Tapping noise under Valve Cover At Low RPM?http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html

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These will help.
Thanks.

Nov 22, 2012 | 2008 Toyota Avalon

1 Answer

High engine idle about 2000 rpms


I would have it checked to make sure no error codes and then suggest only having the IAC it uses checked or serviced-----Idle air control exists in many drive by wire vehicles--have a physical throttle and or cruise control cable-----the start is Google this year model with IAC symptoms.

They get dirty or fail and all sorts of idle issues are possible

Nov 02, 2012 | 2007 GMC Sierra 1500

1 Answer

I have a 2003 dodge intrepid es with the 3.5l motor 1 day I was driving and my car over heated and just shut off when I lifted the hood the radiator hose was busted I finally got it home and opened it up...


You need to find out what fault caused the check engine light to come on, until the fault code is retrieved from the engine control module memory you are 100% guessing. I think you have a misfire.

Mar 03, 2017 | 2003 Dodge Intrepid

2 Answers

Idle will not come down, also at times it will go up while cruise down the road.


start with replacing the idle air control valve-very common

Feb 17, 2010 | 2000 Saturn SL

1 Answer

Idle speed is too high on my Freelander 1.8 petrol. It doesn't happen all the time, but when it does it sits at 1500rpm although sometimes it sits at 3500rpm. In every other respect the engine performs...


The Idle air speed control of the car is starting to go or the Mass Air Flow sensor is starting to go. I would have the vehicle checked out by your local Mechanic. The HIgh RPM at 3500 on start up is going to cause internal damage to the engine over time. The engine oil can not circulate fast enough on initial start up to all the lubricating parts.

Gook Luck

Jul 26, 2009 | Land Rover Freelander Cars & Trucks

1 Answer

Engine won't start after running at cruise for 2 hours.


verifica la precion de gasolina es el regulador de precion.

Apr 06, 2009 | 1985 Nissan 300ZX

1 Answer

92 chevy corsica when starting engine reves real high and then idles normal what could cause this?


as , with most corsicas , around that time , it seems that there is a general problem with the cruise control . . .
try unhooking the arm that connects the cruise control to the engine . . . should be easy to take off ,
and see if that helps the problem

Aug 04, 2008 | 1988 Chevrolet Corsica

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