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2nd Generation
Misfire Diagnosing/Troubleshooting Advice?
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<blockquote data-quote="itzHypn0tic" data-source="post: 15959303" data-attributes="member: 190475"><p>Sorry for the late response here... So I ended up checking all of the wiring between the PCM and the coil packs and everything seemed to check out... I apparently did something to cause the PATS system to trigger and blow the fuse for the PATS/PCM/etc, but fixed that since. That seemed to have occurred with further troubleshooting and I don't think it was related...</p><p></p><p>I finally ordered a leak down tester adapter and tested the cylinders. It looks like at least my #4 cylinder is leaking and I'll need to pull the heads and possibly an engine rebuild. I did not check my cylinder #6, but I figure I'll have to pull both heads anyway. I checked both TDCs at 90psi and they only held 20psi. It sounded like it was at least leaking out of the intake, but I'm preparing for the worse.</p><p></p><p>Would a bad cylinder cause the check coil pack check engine light to come on for any reason? I wouldn't think so, but if the bottom end is messed up... Could that then cause the crank to misread and cause it?</p><p></p><p>Would you also have any good recommendations on what I should do when the engine is apart? If the bottom end is ok, I was probably going to just look into fixing the heads for now. Is there any way to "bullet-proof" the spark plugs and issue or are stock heads worth replacing?</p><p></p><p>Finally is there any recommended bottom end kit that's typical? If I have to rebuild the bottom end I'd like to do it right, even if I keep stock level horsepower for a little bit...</p><p></p><p>Thanks and sorry for the novel <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="itzHypn0tic, post: 15959303, member: 190475"] Sorry for the late response here... So I ended up checking all of the wiring between the PCM and the coil packs and everything seemed to check out... I apparently did something to cause the PATS system to trigger and blow the fuse for the PATS/PCM/etc, but fixed that since. That seemed to have occurred with further troubleshooting and I don't think it was related... I finally ordered a leak down tester adapter and tested the cylinders. It looks like at least my #4 cylinder is leaking and I'll need to pull the heads and possibly an engine rebuild. I did not check my cylinder #6, but I figure I'll have to pull both heads anyway. I checked both TDCs at 90psi and they only held 20psi. It sounded like it was at least leaking out of the intake, but I'm preparing for the worse. Would a bad cylinder cause the check coil pack check engine light to come on for any reason? I wouldn't think so, but if the bottom end is messed up... Could that then cause the crank to misread and cause it? Would you also have any good recommendations on what I should do when the engine is apart? If the bottom end is ok, I was probably going to just look into fixing the heads for now. Is there any way to "bullet-proof" the spark plugs and issue or are stock heads worth replacing? Finally is there any recommended bottom end kit that's typical? If I have to rebuild the bottom end I'd like to do it right, even if I keep stock level horsepower for a little bit... Thanks and sorry for the novel :) [/QUOTE]
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