What causes Backfire with an Edelbrock 4 barrel carb?

I would think the engine is out of time or the spark plug wires are not installed correctly.





Carb is too lean, Common problem with Edelbrock. Buy a primary metering spring kit.



Dude, I had this exact same problem. 350 engine and the Edel 4b carb.

I was looking every where online for answer's and basically it could be anything from lack of fuel to timing to the advance on the carb. I tried everything, then i pulled off the valve covers and noticed one of the rocker arms wasn't moving. i turned the nut in the center one full turn and booooom it ran like a champ!!!!

I bet if u pull the covers thats your problem...

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