Running Rough
09-12-2008, 10:23 PM
#1
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Year: 1990
Model: Cherokee
Engine: 4.0
Running Rough
1990 cherokee laredo, 4.0
between 800-1800 it runs rough and backfires but above 1800 it runs perfect.
i dont know what it could be, I think it could be the throttle position sensor or something. HELP me out guys. Thanks
between 800-1800 it runs rough and backfires but above 1800 it runs perfect.
i dont know what it could be, I think it could be the throttle position sensor or something. HELP me out guys. Thanks
09-12-2008, 10:25 PM
#2
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Check the intake manifold for loose or missing bolts. If that isn't the problem look for leaking vacuum lines.
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