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backfire means a lean mixture. So if you're confident that the carb is good you need to change the fuel pump
If the answer is satisfactory, make sure to hit the accept button so i get paid for my time. Thank you, Billy
replaced the fuel pump while I was at the store also changed dist cap plugs and wires still did not fix the problem. bypassed the fuel tank and ran fuel can directly to to pump still having the same problem
In that case i think or the cam actuating the fuel pump is worn, or there's a problem with your carb.