Fuel and Engines
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How to adjust the injectors on a 12 valve cummins to make it blow black smoke?


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if you have a first gen (1989 to 1993) 12 valve cummins.turn the fuel screw one turn or more turns to create horspower and torqe and black smoke.

but if you have a gen 2 a (1994-1998) then you have to move your fuel plate up.