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post #16 of 18 Old 10-04-2010, 07:14 AM
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1990 MJ Comanche 
Join Date: Oct 2009
Location: Prescott
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Originally Posted by dukie564 View Post
fluctuating rpms can also be caused by a vacuum leak to the manifold. Check all your vacuum hoses for leaks or disconnections
Good advice as we have shifted gears from a stall/no-start to an idle issue. with the engine cold, snug up the intake manifold bolts working froom the center outward. Also spray some oxygen sensor safr throttle body cleaner around area that could have vacuum leaks. Idle will change when you hit them. BTW, ever cleaned the throttle body and idle air controller? Good place to start and it's preventative maintenance anyway.

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post #17 of 18 Old 10-04-2010, 11:48 AM Thread Starter
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1991 XJ Cherokee 
Join Date: Jun 2010
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Well I think it was the sensor connection. I fiddled around with it some more and it has given me no more trouble.
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post #18 of 18 Old 10-04-2010, 11:50 AM Thread Starter
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1991 XJ Cherokee 
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But thanks for ALL of the tips!
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dead , start problems , starting issue , xj

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