HEI distributor tuning problem

[formikaus]

Sorry to hear all the problems you are having. When i put my Accel billiet HEI with a supercoil cap in, I did not use the vacuum advance. I just left it capped off out of the box. I did still have some pinging at the same speed range ONCE THEY STARTED ADDING ETHANOL!!!!! I started putting in 93 and it quit. With it capped off I did still get around 18 mpg's, but I am running a stock cam, 700R4, and 308 gears. Like I have said before, I feel for you. A engine noise is as bad as door glass without weatherstripping....it will drive you crazy! Lol.