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Jeep Wrangler YJ
YJ General Discussion
Intermittent no start: lost big time
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<blockquote data-quote="machoheadgames" data-source="post: 429329" data-attributes="member: 18789"><p>When you flip the key to acc or run (before starting it), does the check engine light light up? It should, and then it should go off. Sometimes the capacitors in the PCM go bad and then that process doesn't happen. If you flip the key and then a few minutes later the CEL lights up, you would also hear the fuel pump prime and then it would start right up.</p><p></p><p>However, the fact that yours runs poorly after starting makes me think it's something else. Bad PCM capacitors usually cause a long start, but once it's started, runs fine. </p><p></p><p>You very well may have a wiring issue, since it's not starting with starting fluid and also not working any better after replacing all those electrical components.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 429329, member: 18789"] When you flip the key to acc or run (before starting it), does the check engine light light up? It should, and then it should go off. Sometimes the capacitors in the PCM go bad and then that process doesn't happen. If you flip the key and then a few minutes later the CEL lights up, you would also hear the fuel pump prime and then it would start right up. However, the fact that yours runs poorly after starting makes me think it's something else. Bad PCM capacitors usually cause a long start, but once it's started, runs fine. You very well may have a wiring issue, since it's not starting with starting fluid and also not working any better after replacing all those electrical components. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Intermittent no start: lost big time
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