Vacuum leak!!! Rought idle!! -
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Unread 07-29-2013, 10:54 PM   #1
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Join Date: Jun 2013
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Vacuum leak!!! Rought idle!!

just replaced all my sensors in my 87 it's running pretty rough when Its in idling. Narrowed it down to a vacuum leak. Now I can't pin point it, how can I find it without a smoke Machine?

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Unread 07-30-2013, 06:07 AM   #2
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1990 MJ Comanche 
Join Date: Oct 2009
Location: Prescott, Arizona
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Why not just spray around suspected areas with an oxygen sensor safe carb/throttle body cleaner?

Have you checked to see if your intake manifold bolts have loosened?
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