Running Rough
Thread Starter
Newbie
Joined: Aug 2008
Posts: 6
Likes: 0
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
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
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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