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Old 09-12-2008, 11:23 PM   #1
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1990 Cherokee
Question 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
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Old 09-12-2008, 11:25 PM   #2
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Check the intake manifold for loose or missing bolts. If that isn't the problem look for leaking vacuum lines.
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Old 06-13-2009, 02:46 PM   #3
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1996 Grand Cherokee

Have you checked the sparkers, leads and distributor. It sounds similar to wat my 96 GC is up to. Let me know how it goes
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