need help think I'm losing power after 2000rpm

[Coaltrain03]

I've recently installed a 180 pump with 5gsks and 191 delivery valves truck also has 5x16 injectors the timing is at 27° at wide open throttle it pulls good till bout 2k rpm it just quits pulling my boost gauge only reads 22 lbs max I don't have a clue on what it could be I've checked everything I can think of I figure I'm over thinking it

[95cummins5.9]

Gsk loose? Fuel pressure suck?

[Coaltrain03]

I've my fuel pressure gauge tapped to the banjo bolt on the side of the injection pump it goes crazy but at wide open throttle I only saw max of 17 psi so I've got a fass 220 I'm putting on this week and how would I tell if the springs are loose cause either idle it revs fine I've hit 3500 for now just got my valve springs and headstuds in

[95cummins5.9]

How high will it rev?

[Coaltrain03]

I know it will hit 3500 and want to keep goin

[Coaltrain03]

It free revs fine just driving it does it

[95cummins5.9]

Waste gate ?

[Coaltrain03]

Haven't checked it it's still on factory turbo but I'll check it out just trying to figure out process of elimination jus what to check

[95cummins5.9]

I bet it smokes like your username.

[mike_belben]

if youve still got a stock fuel system, obviously filter first. next pull the strainer down, check for it being full of trash. then pull the heater grid and look at the electrical connector between the pins. any melted plastic is a dead heater.. id never recommend putting one back in, they all eventually die and leak air. next is the sharp hose elbow from strainer to pump, they tend to delaminate in that corner and behave just like you describe, if its squishy/rubbery, its junk. i replace with hose barbs and a long segment of looped 1/2" hose zip tied up to the brake master so it doesnt rub the steering shaft. nothing can make that bend without kinking. after that id pull the fitting off the mechanical lift pump and check for a snapped spring, i had that break and also run like yours. overflow valve could probably do the same. rotted metal lines ontop the tank and old fuel hoses will too.

on an old truck with fuel issues.. i find the cheapest and fastest solution is to just drop the tank, pull the sender, and go through the whole thing with new hose from front to back.

[Coaltrain03]

Will guess it's a good thing my fass 220 is in so sometime this week it will be getting put on with a new torktek 60hp overflow valve

[Thekid760]

try tightening your gov springs up a click. my 4k would rev after i put them in but was gutless higher rpms, i tightened them up one click and BAM, a whole different animal.

[Coaltrain03]

I will try that thanks