Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

7041211 slight stumble off idle sometimes

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Cliff Ruggles:
That's still pretty lean for one of those.  I'd fatten it up some and if you haven't done so remove the factory APT screw in the baseplate and install one of our external APT screws.

Good thing it's not the GM 290HP crate engine, it's a complete TURD everyplace.  Not sure what they were thinking there, but using a 350/350hp camshaft in a 350 with barely 8 to 1 compression doesn't work for chit!

I've had several of those brought up here for custom tuning and they are PATHETIC.  Not even sure how GM gets away selling them.

I contrast the 330hp crate engine with the small roller cam is a home-run everyplace.........Cliff

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