code p1391 and misfiring -
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Unread 12-27-2013, 06:41 PM   #1
Registered User
2001 WJ 
Join Date: Dec 2012
Location: Naperville, IL
Posts: 134
code p1391 and misfiring

Hey everyone,

I have just started having in issue with my WJ. I drove home to MI from IL (4hr trip) with no issues and two days later i got in and my jeep was running real rough and "chugging" Code p1391 came up.

Now this isn't the first time i have this code, i have already replaced toe cam and crank position senors 3 times (in about a year) first two with autozone sensors and 3rd with Mopar.

I just changed the camshaft position sensor out again (4th time) with a Mopar part. After replacing it is still running real rough.

Now my question is, what else could be causing this issue? I have been reading and have seen talk of bad timing chains, or tone wheels etc.. How would i check for this? Any help diagnosing this problem would be great. I need to be back to IL by the 30th, so need to figure this out ASAP.

thanks in advance to everyone.

lemiller is offline   Reply With Quote
Unread 12-27-2013, 07:21 PM   #2
Registered User
2001 WJ 
Join Date: Dec 2012
Location: Naperville, IL
Posts: 134
update, also have code P0320 showing. Which is crank position sensor. Is there anyway to test the sensor before replacing? Also how would i go about testing the harness/ connector for a short? Seeing as this is my 3rd sensor I'm thinking maybe an electrical problem with the harness or the connector.
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Unread 12-27-2013, 07:24 PM   #3
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Join Date: Mar 2013
Location: clarkston, mi
Posts: 108
mine was doing the same thing. i believe that it was that code p1391 it was throwing. i have a 4.0 and had a bad coil strip. it was around 100.00 for all new coils. they come as one unit. problem fixed.
00jeepthing is offline   Reply With Quote
Unread 01-04-2014, 08:39 AM   #4
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2000 TJ Wrangler 
Join Date: Sep 2008
Location: Ft Bragg, NC
Posts: 74

I have the same problem/codes... Crank sensor and all three coils. I had the dealer replace just the crank sensor, it didn't do s***.
Skortch311 is offline   Reply With Quote

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