Engine/Transmission (1994 - 1998) sluggish on p-pumped 24 valve

[JTharpe]

I just p-pumped my 24 valve and now its really sluggish and it won't build boost past 12 psi, I used to make 40-50 psi. The fuel plate is all the way forward and the afc is all the way forward. I feels like it has no power at all times. PLEASE HELP, I need this truck for the farm.

 

[Bob4x4]

Sorry for your woes,I tried telling you this swap was not the best for you... ... .....

 

[rMetzger]

Is there a timing difference that optimizes the situation?

 

[GAmes]

The FASS might not be giving you enough pressure. P-pumps need more than the 24 valve pumps.

 

[Gary - K7GLD]

Maybe the VP-44 is computer controlled and optimized for a reason...

 

[BigPapa]

The FASS might not be giving you enough pressure. P-pumps need more than the 24 valve pumps.

This ^^^^^^.

If the FASS was used on the 24V you'll need a different spring for the bypass valve in the base. The 24V is set up for 8-10psi. The 12V needs 17 - 22 psi at idle and 25 - 35 psi at 2500 rpm (no load).

Call FASS or a FASS dealer.

 

[JTharpe]

Thanks guys, I did get the updated version for the conversion from FASS I have about 40 psi of fuel pressure, I messed with the afc and it took about 50 psi of air to move the arm, I cleaned it up and adjusted the star wheel a little bit so far it appears to be better I will actually road test it tomorrow.