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V8 Air Fuel adjustment

  • 01-10-2021 5:14pm
    Registered Users Posts: 846 ✭✭✭ Wavey

    Hi All.

    I'm trying to set the A/F ratio on my 71 Stag with Weber carb. My target is 13 using an AFR sensor in the exhaust. I can achieve the target with 1 row of cylinders but I can't get the other row any leaner than 10.5 before the adjustment screw bottoms out.

    Does anybody have any idea what would cause this?

    I would think that any dirt in the carb or blocked jets would cause the opposite problem.

    Many thanks for any advice.