Question about 2005 Jeep Grand Cherokee

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My jeep's engines revs up and down when it should be idle. Sometimes the jeep doesn't have much power eventhough it will drive..very slowly.... after i start it on cold/damp mornings. Any ideas?

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I can't give you a direct answer but maybe some ideas..... Check around for vacuum leaks. If you are unsure how to check vacuums, type in google how to. Also, how many miles? Condensation plays havoc on electrical connections and can mess with performance instantly. It did on my 94 cherokee. Check intake/butterfly plate for dirty/carbon build up and clean with appropriate cleaner. Check plugs and wires for resistance - use dielectric grease. I know this is a bunch of checks, but this is all free before replacing parts! Hope all goes well!

Posted on Oct 24, 2010

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My friend owns a 1995 Mercury Mystique.She had a new starter put in and after that the car will start but you cannot rev up the engine to drive it. If you rev it up very slowly the engine will rev,but if...


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My jeep cuts off while driving, no shaking or stalling, just turns off. Then it will cut right back on and keep going.


Hi there,

This does sound like an electrical issue.

However, you should NEVER replace any component, until you have extracted your vehicle's OBD codes.

Do this by the following method:

Rev the car to 2500 rpm (while in Neutral or Park), then slowly reduce revs down to idle.If equipped with automatic transmission, cycle through each position (Drive, Park, etc).If equipped with air conditioning, also cycle that ON and OFF.
1 Turn engine OFF.2 Retrieve the trouble codes: turn the ignition ON-OFF, ON-OFF, and finally ON again (within 5 seconds).3 The stored 4-digit fault codes will be displayed in the odometer (speedo) display area.
Reply back with these codes and we can assist you further.
Cheers,

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My jeep is missing when idling and rev it and revs comes down slowly and missing just above 1000 rev and then falls to normal rev.what could be wrong?


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1 Answer

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1 Answer

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