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 • 230,000 miles
I have replaced the crank postion sensor, throttle postion and control valve
July 4, 2012.
July 4, 2012.
Idle isn't adjustable on that engine. Was the battery recently disconnected or run dead?
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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