it doesnt have a smoke screw.
the p-7100 injection pump has an adjustment called the star wheel. it controls how the pump fuel in response to boost and low rpm.
you can adjust that wheel and it will give you some smoke. but like everyone said. i wouldnt take my truck away from stock without guages thats just me tho.

 

he is not talking about the star wheel, there is a screw in the back of the afc housing that is called the pre boost screw aka the smoke screw. it puts pressure on the diaphram causing low end smoke. the further you turn it in the further back the afc arm starts.

 

right. i forgot about that screw thats in the back.
my bad.

 

where is the afc screw and how do you adjust it?