trucks running alittle off at the top end

[jstann]

so i put stg1 full force diesel in my truck a few months ago with an adrenaline hpop ran great tons more power 27 30 lbs boost all day long

now its still got alota power but lacks at the top end only 25lbs boost and sputtering in the 2500rpm and above

i have a new fuel pump and a new fuel filter filter helped but im wundering if i just need more fuel psi

 

[KBMKVIII]

Time for efuel

 

[Cratos]

check for exhaust leaks, and boot leaks.what is your fuel psi?

 

[jstann]

I don't have a fuel psi gauge

 

[JCart]

e-fuel if all else is in good shape.

jrc

 

[silverpsd_06]

Time to step up your running your injectors a little dry

 

[Old OutLaw]

how old is the oil, and what kind is it ?

if it got some miles on it (3000 or more) and it's Rotella, I'd change it to Valvoline Premium Blue and see what it does......

if that isn't it, the previous posts are probably correct...time for e-fuel.....

 

[jstann]

It's prbly close for an oil change .... I run chevron Delo 400 ... It seems to last the best

 

[jstann]

I'm thinkin it's time for efuel

 

[golfer]

...I'd recommend actually measuring the fuel pressure before throwing parts at it...