i just installed the fass hpfp ( pump only kit) today it is the 95 gph. i have a low pressure light kit that was coming on with the stock lp so i decided to get the fass and i installed it today i test drove after i installed the truck has alot more power but the light still comes on at wide open throttle and goes out when the last gear kicks in i am very disappointed. my truck is bone stock, maybe i have a problem in the tank with the mesh screen or something? i thought these pumps where supose to be monsters?

 

Dont trust your light....check the pressure with a mechanical gauge.

 

I agree, check with a real pressure guage.

 

I have the full FASS 95 on my truck and it idles @ 12 psi and WOT 10 PSI measured with a mechanical ISSPRO gauge without an isolator.

Double check your lamp with a test gauge. You can buy one from Pep Boys for about 30 bucks and it will connect to the test port at the VP44. Just ignore the "for gas only" verbiage on the packing.

Joe

 

I have the same setup and same pressure. Get a gauge.

 

thanks guys for the info i will check with a pressure gauge, i just went to maine and back with the truck about a 1000 mile round trip and it is now leaking from the hole on the bottom of the pump i just called the place where i bought it from and hes going to call fass he said it shouldnt do that, and i noticed now when the truck idles it cuts out for a split second then back in again doesnt do it all the time but i definetely heard it about 4 times when the truck was idling, could the fass be doing that? it never happened before i put it on but i am throwing a 0122 code which i think is a throttle positioning sensor? please help.

 

the 0122 is for the TPS or refered to APPS and avoid going to the dealership...i need to get one myself since my truck is doing the same thing. i plan on picking mine up from a local cummins dealer