Results 1 to 3 of 3

Thread: help!!! rail pressure dropping off 2.8 duramax

  1. #1
    Tuner in Training
    Join Date
    Jun 2018
    Location
    Australia
    Posts
    15

    help!!! rail pressure dropping off 2.8 duramax

    hey guys iv having an issue with a build im doing, its a 2014 2.8 duramax and has an after market 46mm turbo, +30 nozzles ect.. iv blanked off the rail relief but still loosing rail pressure. im commanding 29000psi but if just drops off to 16000psi and always around the 3000-3400rpm. Any ideas on whats happening?
    Attached Files Attached Files

  2. #2
    Tuning Addict
    Join Date
    Jan 2015
    Location
    Franklin, NC / Gainesville, Ga
    Posts
    6,733
    Haven't looked at the log, but remember the basics - mechanical bypass, hpfp, supply "filter's plugged, pickup clogged, line collapsing or supply pump" or new injectors not operating correctly.....
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC

  3. #3
    Tuner in Training
    Join Date
    Jun 2018
    Location
    Australia
    Posts
    15
    Ended up being the SCV valve. runnig 50psi boost and holding 28000-30000PSI rail pressure now