THE RPMS WONT STAY AT IDLE IN PARK OR DRIVE WITHOUT MY FOOT ON THE GAS WHAT WOULD BE THE PROBLEM

1998 Jeep Grand Cherokee

Tiny

ken44

July, 4, 2012 AT 2:27 AM

I have replaced the crank postion sensor, throttle postion and control valve

FOUND 3989 RELATED QUESTIONS

5 Answers

Tiny

ASEMaster6371

July, 4, 2012 AT 2:31 AM

Base idle needs to be set or dirty throttle body.

Roy

Tiny

ken44

July, 4, 2012 AT 3:24 AM

Thank you for that info but how would I set the base idle

Tiny

caradiodoc

July, 4, 2012 AT 6:19 AM

Idle isn't adjustable on that engine. Was the battery recently disconnected or run dead?

Tiny

ken44

July, 4, 2012 AT 3:24 PM

Yes it was recenttly disconnected to charge the battery and it was dead

Tiny

caradiodoc

July, 4, 2012 AT 6:11 PM

The Engine Computer lost its memory and has to relearn "minimum throttle" before it will know when it must be in control of idle speed. It also might not give you the normal "idle flare-up" to 1500 rpm when you start the engine. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.

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