Fuel and Engines
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How To

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

Answer

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Wiki User
01/01/2011

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.