Hello folks, while at idle my 350 backfires or pops out of the driverside only. I did a search on the site and someone suggested for a simular post that it was possible to have two wires crossed. I checked them and they are right, so what is the problem. It starts fine and idles fine except for the poping. Is it possible that I may have a stuck valve? Thank you for any help!
350
mild cam (not sure of specs)
hei w/the adjusted weights and springs (middle range)
accell super coil
headers
holley 600
Correct at idle and deceleration
Plugs are new
wires seem to be in good shape, no obvious damage
have not put the vacuum on the carb to tune yet, tomorrow
maybe a small exhaust leak around header collector
One other thing-a friend told me to pour Marvel mystery oil down the carb, if it was a stuck valve it may free it up. I don't think I like that idea. Anyone ever did that before?
I do have the vacuum advance hooked up to the port (base of carb). I am going to pull the plug and isolate the cylinder, then pull the valve cover an take a look at it. If the valve is stuck, I should be able to tell with the cover removed, right?
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