Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Confirm these specs, please. Cadillac 500

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Hillbillyenginering:
Guess I'm thgthgrowing my two cents in.
I know you said its rebuilt correctly. But I have seen two posts on here recently where they found,after multiple comments, that one of the throttle plates were slightly off causing similar issues.
Are you verifying with a feeler gauge that the primaries are in dead closing all the way. Anything slightly bent or worn will cause this. I had a throttle cable sticking once. Throttle shaft bushings?
Egr or pcv valve ?

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