2002 Liberty 3.7 misfire code issues - Page 2 - Jeep Garage - Jeep Forum

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  #13  
Old 10-01-2015, 12:51 AM
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Re: 2002 Liberty 3.7 misfire code issues

A leaking fuel injector is a good possibility. It would cause the fuel line to drain after shutdown and cause hard starting and could cause a rich mixture at the O2 sensor (especially at idle), causing the PCM to downtrim the injector pulse. It would be a significant leak, so easily to trace. You could take all injectors out and let them clean in an ultrasonic bath and then check the spray pattern and if they are closing properly.

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  #14  
Old 10-05-2015, 02:53 PM
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Re: 2002 Liberty 3.7 misfire code issues

For closure sake - hopefully this will be my last post for a while. Injector #3 had a steady drip. Upon replacement, they car started right up (and continues to start right up) and the shudder I felt from constant misfires has smoothed out at idle, stoplights etc... No CELs

Thanks for all the support
dean
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  #15  
Old 10-05-2015, 05:09 PM
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Re: 2002 Liberty 3.7 misfire code issues

Good to hear its fixed, happy jeeping.
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