Have you checked the powrvalves are properly setup and working? If they don't open it can sometimes cause problems.

If your PGM has died, you can usually tell by taking the top off and having a look and smell inside. If there is no obvious burning or exploded components, give it a good sniff to see if you can smell that something in there has overheated. If it looks / smells fine, then I'd suspect it was ok and you have another problem, like a pickup issue perhaps, or a bad line to your spark plug coils.
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