Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

17084226 APT adjustment

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77cruiser:
Does it help at all by opening the mixture screws more?

65malibu:

--- Quote from: 77cruiser on August 09, 2022, 10:13:27 AM ---Does it help at all by opening the mixture screws more?

--- End quote ---
I haven't tried that because where they are set now is the best idle.

65malibu:

--- Quote from: Kenth on August 09, 2022, 12:06:49 AM ---If lean surge at 1200-1500 rpms i would rather look at the idle tubes, idle tube restrictions, lower idle air bleeds and idle needle holes than main jetting.

--- End quote ---
Looking at the specs of my carb and engine, any recommendations on changes to the above areas?

quadrajam:
Try .059ish on the DCRs. stock was .055
Might even try .040ish on the tubes.stock was .035 but first
see if anyone else will chime in with some other
ideas.

77cruiser:
Or make the idle bleeds smaller.

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