When my opti went, it just died on me, no code or SES warning at all.
It threw the codes only the day after I had let it sit and then tried to restart it.
But like all things, check for all things before shot gunning parts. Spark plug wires not arcing, spark plugs good, good fuel pressure and good battery voltage. Since its not doing it at only hot temps I would say your ICM is prob not the culprit.
How old is the opti? Did you verify both vent lines are attached to it?
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Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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