HELP!!!! Strange Misfire I can't fix.
11-22-2014, 12:21 PM
#31
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Year: 1999
Model: Cherokee
Engine: Inline 6 4.0
So I'm going to do the plugs anyway just to see if that is my problem. If not, what would be your next guess?
11-23-2014, 01:03 PM
#35
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Year: 1999
Model: Cherokee
Engine: Inline 6 4.0
I didn't mean to hijack. The OP had a similar issue. I thought it better to ask here instead of ask the same question again.
11-23-2014, 02:08 PM
#36
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Year: 2001
Model: Cherokee
Engine: 4.0
So after a brand new coil pack switching back to copper core plugs and a brand new locking mopar gas cap and using the PCM reset suggested I put a little over 100 miles on her and no CEL. Thank you all for the suggestions and help. She's purring like a kitten again.
11-23-2014, 02:22 PM
#38
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Year: 1999
Model: Cherokee
Engine: 4.0
If you are having random misfires it could be your Camashaft Position Sensor (inside your distributor). Check the wiring to the CMP for chafing/exposed wires. If not defects are noted you may want to try a new CMP. Other than OEM (big $) NAPA sells a good one.
No guarantee it will fix your problem though. Your choice.
11-23-2014, 07:11 PM
#39
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Year: 1999
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No harm bud, but it's always a good idea to start a new thread, especially if you have a different ignition system. If you are having random misfires it could be your Camashaft Position Sensor (inside your distributor). Check the wiring to the CMP for chafing/exposed wires. If not defects are noted you may want to try a new CMP. Other than OEM (big $) NAPA sells a good one. No guarantee it will fix your problem though. Your choice.
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