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is a 73 mazda pick up
the engine is a 4 cylinder b1800
i checked to make sure the right valves were opening and the rotor is in the approtriate position and it all checks out.. i too thought i might be 180 out.. so i double checked my double check..LOL... i put the intake on the carb and the back fire then went to the exhuast side.. my thought is it could be the valve lashing... the valves not closing all the way...
what do you think about this?
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