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Discussion Starter · #2 ·
Based upon the oxygen content in the exhaust (O2 sensor) and other inputs, the computer varies the air/fuel ratio via the stepper motor to maintain an optimum 14.7:1 ratio.

....it controls air/fuel mixture

Regards,

Larry 85CJ7, 350TBI ,T19 4spd
 

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You can pick up an older carter that is identical to the BBD but without the stepper motor and eliminate pretty much all of the BBDs problems (as well as most of your vacume hoses and that mess in the engine bay)

 
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