I have a 2005 Ford F350 with a 6.0 Powerstroke diesel. I have had it to 4 different shops and everyone tells me they do not know what the problem is.
has absolutely no power in the low rpm's. The turbo doesn't start to spool up until around 2,000 rpm's. Once it kicks in it sets you back in your seat. The VGT reads normal at 75% at idle and down to 25% at WOT.
The engine has just been 100% bulletproofed. It has new head gaskets, ARP studs, Sinister Diesel oil filter and coolant
filter, New Powermax turbo, turbo drain tube, EGR delete, Performance FICM, MAP sensor, EBP sensor, Injector O-rings and dummy plugs, coolant flush and extended life coolant added, HPOP fitting replaced, fuel Blue Spring conversion and a few other little things.
Literally every sensor reads fine at all ranges and loads according to several different mechanics. There is no boost leaks (pressure tested), the turbo spools up fine (no exhaust
leaks), the injectors have a nice even power range (#3 is getting a tad bit weak, but is well within specs), and the fuel pressure at WOT never drops below 60.
The only things that haven't been changed are the ICP, IPR the HPOP and the actual injectors. Just about everything else has been replaced since it was already apart. This has been an ongoing issue for weeks and I REALLY need this truck to be able to pull out of an intersection faster than a horse and buggy.