Quote:
Originally Posted by Jac Mac
1. Have you tried the timing light suggestion I made a while back to help rule out ignition or fuel problem yet.
2. I note in your posts that you were disconnecting power leads etc during tests, is there any chance during these procedures that you have inadvertently reversed polarity of any of those connections.... along the lines of the well known MSD polarity reversal when racers substitute waterproof connecters and get the loom colours confused.
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I haven't done the timing light but I do think it is ignition related at this point. It will even break up at 4500 if approached slowly, not at WOT.
I replaced my MSD box with a new digital one that says it senses reverse polarity and won't fire if wired backward. I verified the wire stripe colors and the instructions to both the box and the distributor and have the polarity correct.