350 backfire thru tailpipe
My grandson is currently driving his 70 Camero to Florida. He just called me and said his 350 engine is backfiring again. Let me back-up a little and tell you what happened about 2 months ago . His Camero started to backfire and he took it to a garage and they changed the distributor cap and wires and it seemed to fix the problem. All of a sudden its backfiring again. Any suggestions? Keep in mind its backing thru tailpipe. HELP!