302 backfiring

[88mudder]

what does it mean when a 302 backfires at higher rpm around 3,000, and at any distributer position? Does this mean that its 180 out?

 

[gotmudd]

it's either 180 out or if you have had it apart to say, put in a cam or timing set, you might be one or more teeth off on your cam and or crank sprocket.there is a dot on the cam sprocket that MUST be lined up with the dot on the crank sprocket. put the cam dot at 6:00 and the crank dot at 12:00

 

[88mudder]

it's either 180 out or if you have had it apart to say, put in a cam or timing set, you might be one or more teeth off on your cam and or crank sprocket.there is a dot on the cam sprocket that MUST be lined up with the dot on the crank sprocket. put the cam dot at 6:00 and the crank dot at 12:00

does this mean i gotta take the waterpump and timing cover off?

 

[reginald fairfield]

Is it vacuum advance? Maybe you have a leak in a vacuum line or you have it hooked up to the wrong port.

 

[Psychopete]

If your distributor is 180 out, your engine will not run.

Hook a vacuum gauge up to it (after you set the timing right).

Pete

 

[Bruce]

Could be the fact that the ignition timing is advancing to far and is causing a crossfire, could be weak springs on fly weights or worn distributor or vacuum advance going to far. Put a timing light on it and see how far your timing mark moves at said rpm.