Hello Bombers,
Just came from dealer (again) and have been told I'm down 4% on #4 and #8 cylinders and "need new engine".
I've spent 6k on repairs in last month. ..
Oil leak at turbo supply line "couplers"
Turbo pedestal gasket
New oil pan
Upper rad hose
Fan clutch
Hydraulic control module and valve unit
Master cylinder and all calipers, rotors and brakes
Front wheel bearings

It also had had all new injectors, fuel pump, fuel tank and lines last year...before i purchased (fuel contamination)

Truck was running fine before oil leak work and threw injector #8 code upon reassembly. It now knocks/misses when driven.

Over 20k $ in service and now dealer says it needs replaced. All other cylinders are 100%. I've lost confidence in the dealer. I doubt the test and cant believe the cylinder will not fire down 4%. Do i need an new engine? Is there any other tests/confirmation procedures or possible other causes that might be overlooked?

Any advice would be greatly appreciated. I'm more than a little distraught and piggy bank is broken.

2011 f250 6.7 ext cab long bed auto

 

that sucks , the valves could be coked up and not sealing. Borescope #4 and #8 cylinders they may have been washed down by a bad injector.Look for scores in the cylinder wall. I agree it should still run with no noticeable problem at -4% compression.
Did the injector code come up after the injectors were replaced? Where did they purchase the injectors from. There is alot of junk in a box remans out there.

 

I would get a second opinion