'01 Jeep 4.0L Hard to Start


Old 07-31-08, 04:10 PM
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Join Date: Apr 2006
Location: Texas
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'01 Jeep 4.0L Hard to Start

2001 Jeep Grand Cherokee had had a vacuum leak at manfold, repair vacuum line. But still hard to start. Occasionally the panic system of the security system comes on by itself.
No engine light illumination.
any suggestions.


Last edited by th5809; 07-31-08 at 04:11 PM. Reason: additional info
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Old 08-01-08, 04:16 PM
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Sounds like you have an electrical issue, bad ground or maybe weak battery. Some security systems go off if they think the battery is being disconnected or electrical system is being tampered with.

The check engine light won't come on if the voltage is low during cranking. Check the battery voltage with the engine off/on/cranking. It should give you some idea what's happening. Post your numbers if you're not sure.

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