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2004 Grand Cherokee won't accelerate

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Old 12-05-2021, 07:26 PM
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Model: Cherokee
Default 2004 Grand Cherokee won't accelerate

It runs great, no funky sounds, wouldn't even know it has a problem except for the fact that it won't go over 40ish mph. Also has a problem going uphill. Hooked it up to computer but it isn't pushing any codes. Could it be the map sensor?
Old 12-05-2021, 11:16 PM
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Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
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The first thing I would look into is a plugged up catalytic converter. That would allow it to run normally and not have any power
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Old 12-06-2021, 06:44 AM
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Year: 2003
Model: Grand Cherokee (WJ)
Engine: 4.0L I6
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I've had this problem twice. First time was a clogged cat, second time it was a seized caliper.
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