I put in a rebuilt Chevy 350 with dished pistons, full roller rockers and a mild cam. It was running good when I first put it in but had to rebuild the carb. It has new floats in a 650 Holley doubble pump. Just put new E3 spark plugs in and now the truck runs rough. Pulled the number one plug back out and it is a little fowled out. Sprayed it down and little black specks came out about the size of floor sweep. I don't want to run it any more if something is seriously wrong. I just can't figure it out.
have the same problem?
Friday, July 12th, 2013 AT 3:33 PM