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air fuel ratio

  1. Vintage Mustang Forum
    The air fuel ratio is good in park or neutral, but way too Lean when I'm in gear or holding the throttle. I'm talking off the charts, over 18:1. I think the carb has too small of a main jet (61), but I want expert opinions before I start swapping jets. 65 Mustang 200 six cylinder coupe with C4...
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