Heya guys. Got a problem. I think my timing is off and I don't know how to fix it. The truck runs strong and hard, but i'm starting to get a fule smell from the exhaust. After it gets to running temp, it will start to do some sputtering quiet backfires. It also boggs down for a sec when I hit the gas from a stop. I replace the timing vaccume thingy by the distributer, but that didn't help. Being that I only get about 6 miles a gallon, smelling unused fule is really pissing me off. Could I just be getting all the because there are no cats, no muffler, and no back window? Thanks for any help I can get.