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i think i will justwrite a small essay of questions for you...ha,ha, so what is the black knob under/connected to my throttle body for?...also how does one set air/fuel? do they sell a meter od some sort?
 

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Not they don't sell a meter for it.That I believe is to set the idle Adjustment.Alot of the older cars had it.Most of the newer cars didn't have it.Someone might have installed that throttle body on there.
 
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