ive ran the same as last year this was my second 5 gals used. didnt chage anyting.

Drain the fuel and put new fuel in from a different source. Its the chaepest thing you can try. I had the same problem the beginning of this year. I run alcohol but it would only pop at the top of low & high gear. It was a brand new barrel. I tried and changed everything and it still popped. I was at Memphis and had to buy fuel and believe it or not it quit popping. Try It! Don

well i know it would be someting easy. i think we found the prolbem. 7000 rpm pill in my box. took it out and ran wed and ran with just a little pop. fuel pressure set at 8 but fall down to 6 psi order new regulator .hope that get the old girl going i dont like to see her sick 8). thanks for all the nput

Popping out exhaust or through the carb?