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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="Creston" data-source="post: 443522" data-attributes="member: 22510"><p>Not necessarily. Plenty often the electrical issues are only at idle. How is the battery and the alternator output BTW. With the valve coversoff and a visual, combined with leakdown and compression checks you can tell any valve train issues. Plus any valve timing issues will have a code (cam/crank correlation/ phasers etc etc etc codes). Plus a mechanical valve train issue won't go away for a startup cycle then come back on the second run. </p><p>At least in my experience. Based on what I've read about your case. I'd bet electrical. And I work on them every day. </p><p></p><p>I have a dodge I do oil changes and routine service on (customer says its his last dodge too. Life long dodge man in his 60s). It came up with a cyl 8 (and sometimes a few others) misfire at idle. Started years ago. He has put 150k on it since it developed and nothing has changed. Sharp Hemi truck too.. So there is always that option unless you live in a state that won't allow driving with the check engine light on.</p></blockquote><p></p>
[QUOTE="Creston, post: 443522, member: 22510"] Not necessarily. Plenty often the electrical issues are only at idle. How is the battery and the alternator output BTW. With the valve coversoff and a visual, combined with leakdown and compression checks you can tell any valve train issues. Plus any valve timing issues will have a code (cam/crank correlation/ phasers etc etc etc codes). Plus a mechanical valve train issue won't go away for a startup cycle then come back on the second run. At least in my experience. Based on what I've read about your case. I'd bet electrical. And I work on them every day. I have a dodge I do oil changes and routine service on (customer says its his last dodge too. Life long dodge man in his 60s). It came up with a cyl 8 (and sometimes a few others) misfire at idle. Started years ago. He has put 150k on it since it developed and nothing has changed. Sharp Hemi truck too.. So there is always that option unless you live in a state that won't allow driving with the check engine light on. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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