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Old 03-13-2011, 08:48 PM   #1
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Join Date: Mar 2011
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Check Engine Light

Hey I need some help please. I have a 2001 Wrangler 4.0 Automatic. I am getting a code of P1391. I have replaced the Coil Pack, Sprak Plugs, Cam Position Sensor and Crankshaft Sensor. And light still on. But idie and runs fine like nothing is wrong. Can some one please help me out.

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Old 03-13-2011, 09:12 PM   #2
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Join Date: Feb 2011
Location: Va Beach
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I have gotten the same code on my 97tj but have since had it cleared. I have been reading alot about this and see there are quite a few other jeeps with the same problem. Someone posted something about changing the whole distributor and that fixed the problem. I also has a mechanic tell me that it could be the timing chain. How that could be, I have no Idea. My light came on after downshifting to make it up a hill. Well, its been about 20o miles and I haven't gotten any CELs since. Could be something out of syn within distributor if I am understanding it right, beats me though. Here is what I found on google.
p391 - Google Search

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