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I-6 runs poorly when started warm/hot


 
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evenweight
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Joined: 16 Oct 2006
Location: Vancouver, BC

PostPosted: Mon Oct 16, 2006 7:48 am    Post subject: I-6 runs poorly when started warm/hot Reply with quote

This problem is happening to my 1999 Cherokee 4L inline 6

Went for a long drive in the bush this summer just after having deer mice in the vehicle while camping. Since then if the vehicle is warm/hot the engine runs very poorly for the first 4-5 minutes then everything straightens out and runs perfectly fine. I have had it in the shop but they can't help me. The problem needs to last for 10 minutes or more for the computer to record the error code.

Any thoughts? I would like the vehicle to be reliable as I use it for my fishing trip off in the boonies every weekend.


Thanks in advance for all your help and questions that will lead to the problem being resolved.

Richard
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Jeepn61
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Joined: 16 Oct 2006

PostPosted: Mon Oct 16, 2006 10:05 am    Post subject: HOT I-6 Reply with quote

My 2001 Cherokee has the same problem.
Here is what Chrysler said:
It's a know problem with "heat saturation" in cylinder #3 causing pre-fire.
Chrysler has no cure.

The 4L uses a 210 deg thermostat. I bought a 180 to put in it to possibly help. Before I had a chance to install it I went to Camp Jeep 2006 and talked to Moses Ludel about my problem. He said not to install the 180 thermo but to use a 195 thermo. Moses stated that going lower than 195 would screw with the computer. That is my play for next summer.

I did manage to go this summer with it only happening once after searching out gas that did NOT have ethenal in it. I tried this after reading somewhere that ethenal boiled at a lower temp than gas.

Hope this helps.
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Ricko70
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Joined: 30 Mar 2006

PostPosted: Fri Oct 20, 2006 2:12 am    Post subject: Reply with quote

I've seen mice eat the insulation off wires before, maybe a bare wire on a sensor circuit touching ground?
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dancerman
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Joined: 08 Jun 2006
Location: Atlanta

PostPosted: Fri Oct 20, 2006 10:51 am    Post subject: Reply with quote

Find another shop.
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