Hello all. I have been reading many threads on the subject of low power/possible turbo problems and this one seems to fit my problem quite well. I hope your willing to help.
Well, let the hijacking begin:
2003 f250 6.0. Reg cab. Reg bed. XLT FX4 Stock everything. Original owner. 135K miles. Was in the shop once for ball joints n 2008 and once again in 2010 for ICP and ?pigtail?
Last month I heard a pretty good exhaust leak behind the turbo and after reading a bunch here and sticking my hand back there i realized my y pipe had the ever popular gash in the flex joint. I decided to tackle it myself. Pulled turbo, pulled y-pipe, installed new y-pipe, re-installed turbo, checked for exhaust leaks. All good.
My problem is that my lack of power that I thought was from this massive exhaust leak before the turbo, is still present.
So I took the forum advice and bought a scanguage II and began the mind blowing do it yourself diagnosis.
FICM VOLTAGE= all ok
MAP and BAR = ok (ebp was disabled by ford with some reflash)
VGT is constantly stuck at 85% at idle and while driving!
Egr desired reads anywhere from 4 to 45 but EGR is always zero unless I unplug it then it reads 100. Doesn't move while driving in either state.
BST seems surprisingly normal considering I have zero power? Gets up to around 24 if I push it.
The strange thing is The LOD (engine load at idle is 30 then gets up around 70 sometimes while driving.
Recently EOT has been about 12 degrees higher than water temp.
And finally my question! Does this jive with a stuck turbo unison ring or is it something that's prompting the truck into thinking it needs to be at 85% all the time.? Or a bad vgt solenoid?
I hope I'm making sense and hopefully I'm typing all this in an ok spot