engine and drivetrain DCOE Backfiring

[Guest Anonymous]

-ignition timing might be retarded a bit.

-distributor advance not working properly (springs loose). or maybe 180 deg. out

-plug wires not in correct firing order.

-crack on distributor cap

-points bad

-valve clearances not up to spec.

-intake manifold leak

-exhaust manifold leak a hairline crack will do it.

-blown head gasket

-engine compression low

now on the carb side:

1.idle jets too small

2.idle mixture screws not properly adjusted (average 1.5 - 2.5 turns from closed position or when the idle speed is at it highest)

3.when engine is cold side draft/s tend to backfire or spit, wait till engine is at operating temp.

[Guest Anonymous]

After doing a little research I found that my "pre-setup" carb from TEP was nothing more than a stock out-of-the-box setup from weber. After calling them on it, they said it should be fine just like that. It wasn't, I had to change the main jets, the idle jets, etc.. etc.. It took a lot of trial and error but once I got it dialed in, that single 45 sure ran sweet!