Popping through carb

[hotrodt]

I have 302 that ran fine with a two barrel but since I converted to a four barrel it won't run worth crap.I put a holley on first and it kept catching on fire inside the carb every time it would pop. Next I put a brand new edelbrock 600cfm on it and now it doesnt catch fire it just consantly pops through the carb,the gas looks extremely yellow and i am at the very bottom of the tank is the gas old? any experience would be greatly appreciated

 

[ronburgundy]

popping through carb= lean
popping through exhaust=rich

 

[86bluecobra]

any chance you pulled the dizzy or rewired it? If your timimg is off or your dizzy is wired like a standard 302 not a H.O. you could have issues like you discribe. Conversely if you are running a standard 302 cam and you wire it like a 302 H.O. once again pop pop pop.

 

[hotrodt]

Thanks gentlemen

 

[Shakerhood]

popping through carb= lean
popping through exhaust=rich

Popping through the Intake = BackFire
Popping through the Exhaust = AfterFire