MJ Comanche Tech. Stock & Modified. MJ (86-92)
All discussion regarding the Jeep Comanche, the pickup truck related to the Cherokee platform.

4.0 shaking/misfiring

Old 02-09-2016, 07:57 PM
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Join Date: Feb 2016
Posts: 1
Model: Cherokee
Default 4.0 shaking/misfiring

I have an 87 comanche 4.0 auto and sometimes the engine shakes but when I shut it off and start it back up it stops shaking and runs smooth. When it shakes it sounds like it misfires and the exuast smells like half burnt fuel. I replaced spark plugs and wires a year ago, all the vacuum lines seem to be in place. Any suggestions help. Thanks for looking.
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Old 02-17-2016, 06:31 AM
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Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,741
Year: 1990
Model: Comanche
Engine: 4.0

Check the integrity of the line from the throttle body to MAP sensor.

Also, click on the PINK link below and do Tips 1 through 5 thoroughly.

Oh, and BTW, WELCOME!!!!
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