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Message: [QUOTE="lincolnlocker, post: 1485123, member: 944"] so i am trying to help a guy back home and when i came home this weekend i went to his house cuz everything that he was explaining to me over the phone wasnt adding up and all the basics where checked over.. this is one of 3 7.3s that i haven't been able to diagnose and help fix when putting my scanner on it out of i dont know how many over the years so it has me a little stressed out. prolly more then it should be.. lol... history on truck 2000 sclb zf6 4x4. 186k on truck. he just had motor rebuilt and installed brand new alliant injectors(supposedly not reman but new) put 2500 miles on it and says it ran like a top then all of the sudden it started running like chit and would barley move under its own power. also has new 38r and a few sensors. prolly not motorcraft for most of them but that doesn't matter at this point i dont think anyway.. it does have a superchips flashpaq installed since it is a zf6 he didnt care what tuning he went with but just wanted a mild bump in power. it will fog raw fuel out of the exhaust and if you try to rev it up it just flat out gets nastier and will fill a small shop with white raw fuel smoke in a few seconds when trying to rev it up while parked.. it will only rev to 1500rpm before it stumbles and misses and gets worse.. it wont pull its own ass up a small grade or driveway and has backfired extremely bad a time or two and continues to smoke worse while trying to drive.. i have ran every test and watched every parameter on every sensor and it all checks out. i Uninstalled the tuner and it actually made it worse and wouldn't even let it rev past idle without spitting and stumbling and fogging more smoke. the only thing that i found is that icp will only climp to 1500-1600psi while trying to rev it up.. that is the only thing off.. but ipr dc is only at 7-8% at idle and 500ish icp and 11-15% at 1500psi while trying to rev it up.. so it really isnt that far off.. pulse width at idle while in stock mode was 3.6-3.8 millsec. im not sure but i thought that would be lower since some tuning is maxed out at just above 3 millsec except when its a cold start trying to warm the engine.. but even up to temp, it stayed there.. i ended up putting the tuning back in it and pw dropped to 3-3.2 ms and it did calm a little bit of the smoke and allowed it to rev to 1500rpm. (wouldn't do that in stock tune at all) ut still fogged it flat out acts like it is over fueling or isnt getting any air at all.. i unplugged ebps and the rod didnt move so it souldnt be stuck closed. i even put a bar in there to move the rod and it still had spring pressure holding it open so that shouldnt be stuck.. im out of ideas... Sent from my SCH-I545 using Tapatalk [/QUOTE]