Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Runs rough with air cleaner on

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boondocker:
I rebuilt my quadrajet (from a '76 olds for a '72 cutlass rocket 355) 800cfm. I purchased Cliff's setup, ran excellent for some time now runs rough with the air cleaner on (runs as it should without air cleaner), this is a recent air cleaner K&N...it didn't need to be cleaned but I cleaned it. I don't suspect the air cleaner itself because it started running rough after I was fiddling with the carb...don't ask me what I did, as I don't remember. Any insights would be appreciated :)

boondocker:
Fixed the problem, removed the PCV valve and gave it a shake...appeared to be stuck. Works great now...thanks for all the feedback ;)

Cliff Ruggles:
PCV valves can be cleaned with brake or carb cleaner, they get gummed up sucking out all those crankcase vapors for many years.....Cliff

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