One of my friends told me that he turned up the fuel screw on his 12valve and I was just wondering if anybody knew how to do that because I have no idea. Does anybody know where the fuel screw is?

 

there is no fuel screw on a p-pump that came in 94-98 trucks. here is alot of info on the p-7100 pump. https://www.dieselbombers.com/5-9l-1...-12-valve.html

there is a fuel screw on the VE pumps in the pre-94 trucks. here is alot of useful information on the VE pumps https://www.dieselbombers.com/1st-ge...-pump-you.html

 

oh ya

 

No fuel screw on the P7100?

 

nope fuel plate

 

maybe he means the star wheel?

 

There is a screw on the back of the afc housing, commonly referred to as the "smoke screw". It's basically another fine-tuning adjustment as to when you bring the fuel on, in relation to boost. That's the only one I'm aware of.

 

The only way to turn the p7100 pump up that im aware of is to take the afc housing off and slide the fuel plate forward and loosen the star wheel and slide the afc housing forward and plug off the turbo wastgate

 

why would you want to plug the wastegate? a boost elbow is a way better choice. as for the pump there is also gov springs, mack plug, timing, dv's, and bigger dv's holders.

 

Lets just go all out Dave and say

you could always turn the barrels