Rough idle, misfire...
#1
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Join Date: Dec 2011
Location: Northern Indiana
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Year: 1999
Model: Cherokee
Engine: 4.0
Rough idle, misfire...
I have a 99 cherokee sport, i went on vacation for a week, came back and it ran like crap. it mis fires and sort of "chugs" at cruising speed. and idles rough and rather terribly. i thought maybe the injectors were bad because the code i get is p0202 which says injector 2 circuit open. recently i discovered if i pull a vacum line off the intake it smooths out and runs pretty good. anyone have any ideas??
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Location: Pueblo, CO.
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Year: 1999
Model: Cherokee
Engine: 4.0
Possible causes are; defective ASD relay,defective injector,defective PCM, or defective connectors or wiring. if you have a set of noid lights check for injector pulse signal. if you have it replace the injector.
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