Quote:
Originally Posted by grivera
Jason - Interesting - In 2011 I ordered an M&H engine harness for HEI and they also sent one without the wire installed. I questionet it after install and they sent me the wire so I could add it. At the time, they said it was an issue with the order.
Joe - I would check the coil wire for 12V when engine is running. Likely not your issue but will make for a funky running engine.
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I should clarify here. I asked for an HEI ready harness and I wasn't told "no" I was just told that it adds significant cost to have it done. The rep without saying it couldn't or wouldn't be done, really pushed not to even go there. Since all you need to do is run a non-resistance wire in parallel, it's not hard to make the change yourself.
One other item to possibly look at while you're testing is the coil wire itself. I don't know how it is on the GTO, but in the birds, the resistance wire is in the dash harness and while the coil wire from the engine bulkhead is not a resistance wire, it is not large enough to really carry more than the 7-8 volts that it would be receiving with an unmodified dash harness.
What you would likely want to do is replace that wire with something more suitable for 12-14 volts.
Anyway, just something to check and mark off the list.