Popping sound in exhaust

nm9stheham said

However the timing changes with a polarity flip, that would happen only if you did not move the distributor after making the polarity switch, and just measured the timing before and then after.

My impression of this sitaution is that the OP has been adjusting the timing with the pickup polarity not getting changed, just with polarity as it was when he started this process.

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Yes. I had been working on just getting the engine to idle...which it is now. It wasn't until I got it to idle that I could get a good reading on the timing. It was then that I discovered that it's 40* advanced. With that much initial advance @ 800 rpm I would think that it would run worse than it does. Which prompted the question about the polarity being possibly wrong.