Need help with my sock LB7
#1
05-30-2017, 11:30 PM
Join Date: May 2017
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Need help with my sock LB7
Trucks a 2003 lb7, some back ground before we get into it's issue. Truck has the fallowing mods,
custom intake.
Custom ladder bars.
Custom 4in exhaust in front of rear tire.
Custom boost controller on 32 psi.
ATS manifolds and up pipes.
ATS kit in transmission with billet prostar converter.
ATS copilot.
EFI live dsp5.
Yukon locker.
Ported turbo inlet horn.
Wrapped charge pipes.
F1 90 over injectors.
Industrial injection 85 over cp3.
Fass lift pump.
Truck went from running great, with a intermittent fuel prime issue for the last 2.5 years, all of a sudden omw home one night from work I went to pass someone and it fell on its face hard. Anything over 1/2 throttle and it bogs down bad. Blows a slight haze of dark gray/black smoke instead of it's usual coal rolling. Makes me think it's a fuel issue.
Now what I have done. My snap on scanner doesn't give me a actual rail pressure reading, FML... I have not one single code. I thought maybe the fprv was bad and put in a ppe race valve. Made it a tiny bit better but still wayyyyyy hurt. I have no fuel leaks and just put two new filters on after this happened on the FASS. Still have my wix on the stock housing that has 9,000 on it in the last 2.5 years. What data I do get looks good. TPS etc. I'll attach a copy of the cylinder contribution test. Idk what that should look like, not a diesel technician. Don't have a lot of experience with them. No rookie tho as I'm gm certified. Just looking for help, tips etc here. Don't wanna just throw money away as this **** is expensive!!! Thanks ahead of time!
https://goo.gl/photos/ZsyEAbtTUFfhDwdd9
If there is something you wanna see, data videos of truck driving etc. Let me know and I'll get it!
custom intake.
Custom ladder bars.
Custom 4in exhaust in front of rear tire.
Custom boost controller on 32 psi.
ATS manifolds and up pipes.
ATS kit in transmission with billet prostar converter.
ATS copilot.
EFI live dsp5.
Yukon locker.
Ported turbo inlet horn.
Wrapped charge pipes.
F1 90 over injectors.
Industrial injection 85 over cp3.
Fass lift pump.
Truck went from running great, with a intermittent fuel prime issue for the last 2.5 years, all of a sudden omw home one night from work I went to pass someone and it fell on its face hard. Anything over 1/2 throttle and it bogs down bad. Blows a slight haze of dark gray/black smoke instead of it's usual coal rolling. Makes me think it's a fuel issue.
Now what I have done. My snap on scanner doesn't give me a actual rail pressure reading, FML... I have not one single code. I thought maybe the fprv was bad and put in a ppe race valve. Made it a tiny bit better but still wayyyyyy hurt. I have no fuel leaks and just put two new filters on after this happened on the FASS. Still have my wix on the stock housing that has 9,000 on it in the last 2.5 years. What data I do get looks good. TPS etc. I'll attach a copy of the cylinder contribution test. Idk what that should look like, not a diesel technician. Don't have a lot of experience with them. No rookie tho as I'm gm certified. Just looking for help, tips etc here. Don't wanna just throw money away as this **** is expensive!!! Thanks ahead of time!
https://goo.gl/photos/ZsyEAbtTUFfhDwdd9
If there is something you wanna see, data videos of truck driving etc. Let me know and I'll get it!
#2
05-30-2017, 11:31 PM
Join Date: May 2017
Posts: 15
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