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Jeep Wrangler YJ
YJ General Discussion
Do ECM's "Break Down"?
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<blockquote data-quote="machoheadgames" data-source="post: 440013" data-attributes="member: 18789"><p>For the jerky acceleration, I’d question the ignition coil before I’d question the PCM. PCM usually goes bad in other ways, like capacitors dying.</p><p></p><p>I am curious what you mean about setting timing 8° BTDC? Are you referring to using a keyed timing chain that lets you advance the valve timing? The distributors in these are not adjustable so I’m not sure how else you’d be adjusting timing advance…as the computer controls all of that. Seems like you’re doing it from the distributor but I don’t see how. </p><p></p><p>What are the details on your motor and who told you to advance it? Just curious, I feel the detail might help. But probably ignition coil related. I find stock Mopar to be the best ignition coil, nothing like screaming demon or whatever else.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 440013, member: 18789"] For the jerky acceleration, I’d question the ignition coil before I’d question the PCM. PCM usually goes bad in other ways, like capacitors dying. I am curious what you mean about setting timing 8° BTDC? Are you referring to using a keyed timing chain that lets you advance the valve timing? The distributors in these are not adjustable so I’m not sure how else you’d be adjusting timing advance…as the computer controls all of that. Seems like you’re doing it from the distributor but I don’t see how. What are the details on your motor and who told you to advance it? Just curious, I feel the detail might help. But probably ignition coil related. I find stock Mopar to be the best ignition coil, nothing like screaming demon or whatever else. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Do ECM's "Break Down"?
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