Help with backfire
May 14th, 2011, 1:16 PM
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Help with backfire
I have a 1990 chevy silverado with 350CI engine. Blew a head gasket and had a mechanic replace it. Now truck runs fine until you put it in gear and and get up to about 20 mph. Then it starts backfiring through tail pipe. Heads were redone with new valves, has new ignition coil, plugs, wires etc.
Any suggestions.
Any suggestions.
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