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1987 4.0 compression

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Old Oct 25, 2014 | 08:01 PM
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DFlintstone's Avatar
DFlintstone
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Joined: Aug 2011
Posts: 10,489
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From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
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Originally Posted by DFlintstone
I think that is was Radi was getten at in post #6, being lean making it backfire.
Whoops...tricked me when the backfire moved from the intake to the exhaust. Yea, unburnt fuel igniting in the exhaust. In your shoes I might just see if a new filter brought the pressure up to spec, take it from there.

Doing Criuisers 1 through 5, (or #27 instead of #2) would be an excellent start >>>> https://www.cherokeeforum.com/f51/cru...x-tips-153657/
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