Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Too lean at idle?

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87mcss:
Carb #17059508. 400 sbc, 9.4:1 comp, 235/243 @.050, 109°LSA, 103°ICL.

Cliff Ruggles:
That helps.  Pretty "hefty" cam for the CID and low compression ratio, so it's going to need a LOT of idle fuel and bypass air to be happy.  With 109LSA it's going to a little "stinky" even when you get the carbs idle system dialed in for it......Cliff

87mcss:
Agreed. You can definitely smell the idle, but I'm okay with that. Right now the idle bypass air is at .109 and it seems reasonably happy with the idle tubes at .045. Part throttle and full throttle haven't given me any issues yet.

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