Bad injector

[mrb2001]

i have an 08 with a spartan on 150 tune and dpf delete pipe. the truck has 110000 miles 40000 of which had the chip in it. i recently had the number 5 injector go bad. put new injector in but the truck still doesn't seem right, it is a manual, when i get to higher rpm it just seems like it loses all power shift to a higher gear have good power for a little while and it just drops off. any ideas?

matt

[MrMike06]

What's your fuel rail pressure when you notice the power loss?

[08stroker250]

Where are the EGT's at when you see the power loss? That tunes has a couple of defuel settings.

[mrb2001]

it has thrown a fuel rail pressure code that made the check engine light come on. i haven't noticed what the pressure is when driving it. the egts don't go over 1200.

[08stroker250]

You may have a bad high pressure fuel pump.

[jrstang473]

Pull the upper fuel filter on the motor. Shine a flash light in the bowl and see it it sparkles like gold. If it does that means your high pressure pump is going out and sending pieces of brass into your fuel system.