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Old 06-23-2016, 11:44 PM
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Misfire nightmare 4.0

I have a 2000 Cherokee 4.0 with a really odd misfire issue. Idles rough but smooths out at 1000k. At first. Once it achieves running temperature and I let it slow to idle cylinder 2 starts misfiring. I can literally drive all day with no problem so long as I keep enough gas to it to keep the RPM above 1000. Once the misfire starts it will not stop until I let the car completely cool down. I've got good power, no oil or coolant use or mixing. New plugs, coil. I'm baffled because other than the bad idle it runs great as long as I'm using the two foot method to keep it going. Any thoughts?

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Old 06-26-2016, 05:54 PM
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Re: Misfire nightmare 4.0

Cancel that request. Bad injector. Replaced it and cleared right up.
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Old 06-26-2016, 06:32 PM
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Re: Misfire nightmare 4.0

Good to hear! Happy Jeeping.
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