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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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<blockquote data-quote="Artisanau" data-source="post: 430066" data-attributes="member: 19863"><p>Matt hi, your the only member I’ve found across all the forums I know of, yet there’s probably more, with almost identical issues as you describe. I notice you seem to have disappeared, but your help and diagnosis might help me out which is what these forums are all about, no? My 3.6 has been into the dealer, they just read the code P0306 misfire on 6 OK, but like you my engine purrs like a cat? So I’m saying to the dealer how can it be a mechanical fault with the cylinder? Your just reading the code and saying we’ll do a cyl leakage test and compression. They didn’t even put it on the tester to determine if it was misfiring on 6 by doing a relative scope test, emissions or anything else that might join the dots. So I’m resigned to fixing it myself maybe with some outside help by using the forums, so if you can give me a heads up how you’ve cured yours I’d be very grateful and I’ll respond by letting you know either way. I to think it’s electrical and I’m thinking PCM soldered joint faults, especially with the high temp Those things endure behind the washer bottle. It seems a mad place to instal it. Most cars I’ve had the PCM is fitted in general to the footwells or underside of the dash areas? I’m hoping you can spare the time to re-engage. Regards Mark in Aus<img class="smilie smilie--emoji" loading="lazy" alt="🇦🇺" title="Flag: Australia :flag_au:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f1e6-1f1fa.png" data-shortname=":flag_au:" /><img class="smilie smilie--emoji" loading="lazy" alt="👊" title="Oncoming fist :punch:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44a.png" data-shortname=":punch:" /></p></blockquote><p></p>
[QUOTE="Artisanau, post: 430066, member: 19863"] Matt hi, your the only member I’ve found across all the forums I know of, yet there’s probably more, with almost identical issues as you describe. I notice you seem to have disappeared, but your help and diagnosis might help me out which is what these forums are all about, no? My 3.6 has been into the dealer, they just read the code P0306 misfire on 6 OK, but like you my engine purrs like a cat? So I’m saying to the dealer how can it be a mechanical fault with the cylinder? Your just reading the code and saying we’ll do a cyl leakage test and compression. They didn’t even put it on the tester to determine if it was misfiring on 6 by doing a relative scope test, emissions or anything else that might join the dots. So I’m resigned to fixing it myself maybe with some outside help by using the forums, so if you can give me a heads up how you’ve cured yours I’d be very grateful and I’ll respond by letting you know either way. I to think it’s electrical and I’m thinking PCM soldered joint faults, especially with the high temp Those things endure behind the washer bottle. It seems a mad place to instal it. Most cars I’ve had the PCM is fitted in general to the footwells or underside of the dash areas? I’m hoping you can spare the time to re-engage. Regards Mark in Aus🇦🇺👊 [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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