# 99 jeep gr cherokee idling probs

**URL:** <https://community.cartalk.com/t/99-jeep-gr-cherokee-idling-probs/90195>\
**Category:** Maintenance/Repairs\
**Created:** [June 6, 2015, 7:25pm UTC](https://community.cartalk.com/t/99-jeep-gr-cherokee-idling-probs/90195 "2015-06-06T19:25:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RatSalad](https://avatars.discourse-cdn.com/v4/letter/r/91b2a8/32.png) [@RatSalad](https://community.cartalk.com/u/RatSalad)\
**Post date:** [June 6, 2015, 7:25pm UTC](https://community.cartalk.com/t/99-jeep-gr-cherokee-idling-probs/90195/1 "2015-06-06T19:25:27Z")

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When cranking, i have to give it gas and rev it til it smooths out. Eventually it will run smoothly. When i throw it in gear, it wants to sputter and die out. If I put in D, i have to give it gas or it dies, but I can only barely touch the gas or it dies out. There is a vacuum leak in brake booster, but ive been told the headgasket could be blown.I want to know if the head gasket could be a problem and if its worth replacing the booster.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [June 6, 2015, 8:37pm UTC](https://community.cartalk.com/t/99-jeep-gr-cherokee-idling-probs/90195/2 "2015-06-06T20:37:00Z")

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First I would replace the booster to correct the vacuum leak. If that does not correct the problem, I would look at a dirty IAC. Vacuum leak will cause a bunch of problems and I would start there.

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**Author:** ![wesw](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wesw/32/2713_2.png) [@wesw](https://community.cartalk.com/u/wesw)\
**Post date:** [June 6, 2015, 10:31pm UTC](https://community.cartalk.com/t/99-jeep-gr-cherokee-idling-probs/90195/3 "2015-06-06T22:31:06Z")

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yes. vacuum leaks , IAC valve, and the vacuum line or valve to the valve cover or the PCV system, whichever your jeep has.

I had Identical issues with my jeep and cleaning the IAC valve and throttle body as well as fixing vacuum problems took care of the problem completely, at zero cost!