[chrismoore701]

Originally Posted by rich weyand

I keep thinking about your problem. It could also be a vacuum leak. One thing you could try is disconnecting the brake booster and transmission lines and blocking the ports on the carb, just for testing at idle. If it clears up the problem, you have a leak in a line, or a bad brake booster or transmission vacuum modulator.

The reason I say a vacuum leak is it will leak air into the manifold, making the mixture leaner, which slows the burn, which will want more advance.

I have done all the leak tests, I have rebuilt the carb, The fuel line is new. I had this problem before. it was timed at 12 degrees, ran great for 400 miles. Then started dying at stop lights. So I thought it was the carb, couldn't be anything else, as the distributor was tight. After exhausting the carb issue, I tried to advance the timing to 14. That did the trick. Now with 800 miles on the motor it happened again. Tried 16 degrees, then 22, then 26, then adjusted by ear and checked and it is now at 32.

No idea what is causing this, except the distributor coming apart.

Going to check the plugs tonight and call my builder.