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High Idle

Tiny
CAINMOS
  • MEMBER
  • JEEP CHEROKEE
I have a 88 Jeep Cherokee w/4.0L I6
When I start it, it will sometimes idle really high then if I give it a second will idle back down to the correct rpm. However, the other day it started to idle high while in drive as well. I had problems with the throttle sticking before but I checked it on the engine and it seemed fine. Could this be a vacuum leak, have yet to check for those, or some other type of problem?
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Saturday, September 23rd, 2006 AT 11:46 AM

2 Replies

Tiny
DEMEARSJR
  • MECHANIC
  • 110 POSTS
Usually a vacuum leak around the intake manifold or the throttle body.
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Sunday, October 1st, 2006 AT 10:15 PM
Tiny
BUBBA_KOSKI
  • MECHANIC
  • 129 POSTS
If its not the vacc line, check the choke assembly she may be sticking, as well as the butterfly valve. Then your fuel mixture screws.

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Wednesday, October 4th, 2006 AT 5:45 PM

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