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Help! Even the dealer couldn't diagnose this engine drop-out


 
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94grandcherokeeCO
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Joined: 04 Feb 2007

PostPosted: Sun Feb 04, 2007 6:34 pm    Post subject: Help! Even the dealer couldn't diagnose this engine drop-out Reply with quote

Help! Help! Damsel in distress. My 94 Grand Cherokee has developed a really strnge behavior and it is ruining our relationship!

While driving, the engine will just suddenly cut right out. At highway speeds the drop out is only for a second - then it comes right back up as if nothing happened. At slower speeds, the engine will die entirely. Sometimes it comes back online right away if I restart the engine, other times, I have to wait 5-10 minutes! Usually in the most inappropriate spot...like an intersection! Embarassed

Absolutely nothing else changes. The electical systems don't dim. No warning lights come on. Nothing registers in the computer. Nada.

Three times my local shop has looked at her and can find nothing wrong. In despiration I took her to the dealer thinking that, even if I have to pay through the nose, they will know what is going on. Even they couldn't find anything or replicate the behavior in the four hours they spent on it.

Help! She is otherwise in great shape and a real godsend giving the kind of winter we've been having in the Rocky Mountains this year - I would hate to part with her.

Thanks so much for your help! P.S. Read about the "Jeckle & Hyde" Jeep - sounds somewhat similar.
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tonloco
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Joined: 20 Apr 2005
Location: Watauga, Texas

PostPosted: Mon Feb 05, 2007 6:20 am    Post subject: Reply with quote

have shop replace the crank position sensor what you are discribing happen in my ford f-250 and i did not get any diagnostic lights either.

good luck
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sam991
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Joined: 20 Jan 2007
Location: Derry NH

PostPosted: Mon Feb 05, 2007 4:56 pm    Post subject: Reply with quote

I had a very similar problem, it was the throttle position sensor.
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94grandcherokeeCO
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Joined: 04 Feb 2007

PostPosted: Mon Feb 05, 2007 5:40 pm    Post subject: Thanks! Reply with quote

Thanks so much for your input - will get right on it! Very Happy
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soberidiot22
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Joined: 22 Sep 2006
Location: Hicktown, WI

PostPosted: Tue Feb 06, 2007 12:11 pm    Post subject: Reply with quote

sam 911 is probably right my buddies chevy started doing that after it fell through the ice and we replaced the throttle positioning sensor and it fixed it right away
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