89 xj runs rough
02-17-2009, 11:59 PM
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Year: 1989
Model: Cherokee
Engine: Straight six 4.0 liter
89 xj runs rough
At low speeds or when I'm not on the throttle my jeep hesitates and the eghaust pops. Kinds like it's not getting fuel. I've tried injector cleaner o2 censor and fuel regulator valve still no luck. Any ideas? Thanks
02-18-2009, 09:15 AM
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Year: 1991
Model: Cherokee
Engine: 4.0 I6
Could be plugs, also check fuel pressure at fuel rail. Also rotor, cap and wires.. I am also with COS as if you get that pop it could mean it's backfiring which tends to lead to a timing issue.
02-19-2009, 12:48 AM
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
If it is out of timeing then the computer would not let it start. It could be a bad injector so the seafom suggestion would be my first choice followed by some serious cleanig of the TB and IAC.
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