i set my timing and now its still slow as hell. All my wires are right, all plugs are ok. Can someone tell me all the possibilities? Someone said i might have a vacuum leak, well how do i fix that? How much will it cost. Where does my timing need to be? Right now i have turned all the way to the left, so its wayoff the timing mark. But it runs better than at the mark its supposed to be at.The carb also backfires and pops and different rpms on the highway or when i rev it. I HATE IT! The engine is rebuilt with 20,000 miles on it. Someone please help. I want to be able to stomp on it again and actully move!