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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="Chris" data-source="post: 425320" data-attributes="member: 1"><p>First off, congrats on probably one of the most well written, easy to follow posts I've ever seen in all my years running forums. Posts like this actually make people want to help you!</p><p></p><p>Anyways, I've seen stuff like this before where it seems every logical possibility was exhausted. 9 out of 10 times, it ends up being a wiring issue... yes, a wiring issue.</p><p></p><p>What I mean by that is a wiring harness that has been rubbing against something and has exposed the wires inside, causing them to short out.</p><p></p><p>Often times they're in a hard to spot area, but it's usually the last thing people think to look at, when it should be one of the first. </p><p></p><p>The problem of course is that no one can simply tell you where to look, you just have to be prepared to spend a lot of time tracing the wires.</p><p></p><p>I would start by looking for any spots where the wires are visibly pressed against the body, frame, engine, etc., then look for wear on the harness itself.</p><p></p><p>Here's a perfect example of what I'm talking about (look at the wires in the first post):</p><p></p><p>[URL unfurl="true"]https://wranglertjforum.com/threads/more-check-engine-lights-caused-by-wiring.31828/[/URL]</p></blockquote><p></p>
[QUOTE="Chris, post: 425320, member: 1"] First off, congrats on probably one of the most well written, easy to follow posts I've ever seen in all my years running forums. Posts like this actually make people want to help you! Anyways, I've seen stuff like this before where it seems every logical possibility was exhausted. 9 out of 10 times, it ends up being a wiring issue... yes, a wiring issue. What I mean by that is a wiring harness that has been rubbing against something and has exposed the wires inside, causing them to short out. Often times they're in a hard to spot area, but it's usually the last thing people think to look at, when it should be one of the first. The problem of course is that no one can simply tell you where to look, you just have to be prepared to spend a lot of time tracing the wires. I would start by looking for any spots where the wires are visibly pressed against the body, frame, engine, etc., then look for wear on the harness itself. Here's a perfect example of what I'm talking about (look at the wires in the first post): [URL unfurl="true"]https://wranglertjforum.com/threads/more-check-engine-lights-caused-by-wiring.31828/[/URL] [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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