Thread: backfiring out the carb?

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Originally posted by nystreetscene
Just got my motor put back together, now trying to get it running. All I have been getting is backfiring out of the carb. Ive tried turning the distributer both ways and keep getting the same thing. Any suggestions ?

Im running a HEI ignition 350 in an 82 K20 pickup truck.

Well it could be 180 out, have some plug wires crossed, or have a valve too tight Try pulling #1 plug and rotatiing the engine till the piston is at tdc. the best way to check if your 180 out is to have that vavle cover off and watch your valves. as the piston starts to come up the intake should close and at tdc both valves should be closed. Line #1 plug to that point. Just for reference point I usually have the cap and rotor pointing to #1 cylinder when I wire it. Remember, don't wire it like a ford, chevy criss-crosses. Just a suggestion.