Ok so recently my 08 job 3 f250 went into a local diesel shop for a cab off HPFP and an elite diesel 72.4mm l.p. turbo, while in there the passenger side up pipe was found to be leaking so that was replaced with a factory ford one. The truck is fully ******d so the egr pipe was cut down and modified to relocate the EBP sensor up top. Well long story short after everything is done I go to pick it up after the mechanic test drove it. I turned out of the parking lot and EASED in to the go pedal, at about 15-20% throttle it falls flat on its face with rail pressure down as low as 200psi.
I let off the throttle and smashed it to the floor so I could get out of traffics way and it cleared up, FRP went to 24k+ and i burned a thousand miles off my rear tires. I returned to the shop and he hooked a scan tool up, the only thing thst seems to be way out of whack is the Mass Air sensor, putting the truck in gear and loading the engine the truck thinks it's pulling in over 600g/s of air when 100-200 Is expected. We pulled the black maxx and returned it to stock programming, had a new sensor ran over from ford and none of that changed anything at all, even updated my h&s files.
Since then I've been out on my drilling rig working but he called the other day to update me, he said he got a hold of a used COM from another 6.4, he tried a different new MAF sensor and ran what he called wire overlays to eliminate a problem in the sensor wiring(seems a bit far fetched to me when itd be much easier to just test each wire and compare readings but so far NOTHING has made a difference let alone fix it, I'm losing sleep over it and he's pulling his hair out over the canned thing, i HAVE to have this truck up and reliable by snowfall or I'm screwed, any help or ideas no matter how crazy are appreciated! Oh yea truck just turned 100k miles, s&B intake full sinister ****** with elbow, mbrp 4in dp to 5in straight pipe, h&s black maxx running canned hd300 tunes, brand new Alliant Power k16 and brand new elite 72.4mm atmospheric turbo
I let off the throttle and smashed it to the floor so I could get out of traffics way and it cleared up, FRP went to 24k+ and i burned a thousand miles off my rear tires. I returned to the shop and he hooked a scan tool up, the only thing thst seems to be way out of whack is the Mass Air sensor, putting the truck in gear and loading the engine the truck thinks it's pulling in over 600g/s of air when 100-200 Is expected. We pulled the black maxx and returned it to stock programming, had a new sensor ran over from ford and none of that changed anything at all, even updated my h&s files.
Since then I've been out on my drilling rig working but he called the other day to update me, he said he got a hold of a used COM from another 6.4, he tried a different new MAF sensor and ran what he called wire overlays to eliminate a problem in the sensor wiring(seems a bit far fetched to me when itd be much easier to just test each wire and compare readings but so far NOTHING has made a difference let alone fix it, I'm losing sleep over it and he's pulling his hair out over the canned thing, i HAVE to have this truck up and reliable by snowfall or I'm screwed, any help or ideas no matter how crazy are appreciated! Oh yea truck just turned 100k miles, s&B intake full sinister ****** with elbow, mbrp 4in dp to 5in straight pipe, h&s black maxx running canned hd300 tunes, brand new Alliant Power k16 and brand new elite 72.4mm atmospheric turbo
blows my mind
