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Thread: New Injector Issues!!! Need help!!

  1. #1
    Tuner in Training
    Join Date
    Feb 2016
    Location
    Katy, Tx
    Posts
    27

    New Injector Issues!!! Need help!!

    Ok I need some direction here a little lost. I just replaced my stock injectors on my TBSS after doing a motor rebuild. I started up new motor with stock injectors (33 lb/hr?) then I replaced them and now the truck does not want to turn on. I used the FAST 57 lb/hr injectors that are flow rated using stock fuel pressure. The existing injectors showed 4.7 ms on the scanner and was wondering if that was out of line for the 57's. I bought the truck with a tune already in it and now I have to work off that. Has this injector swap issue happen to anyone else out there. If so where do I need to start my ms injector timing at? Motor info below..

    403 cid
    compression is close to 11.9:1 depending on head gasket
    57 lb/hr injectors
    RHS heads
    102 FAST Intake w/ 102 throttle body

    Any help will be much appreciated.....

  2. #2
    Moderator
    Join Date
    Mar 2014
    Location
    Raleigh, NC
    Posts
    6,347
    Before tune

    after tune

    any logs you have

    any injector data you have

    There is way more to injectors than just the flow rates.
    Post a log and tune if you want help

    VCM Suite V3+ GETTING STARTED THREADS / HOW TO's

    Tuner by night
    CPX Tuning
    2005 Corvette, M6
    ECS 1500 Supercharger
    AlkyControl Meth, Monster LT1-S Twin, NT05R's
    ID1000's, 220/240, .598/.598, 118 from Cam Motion

    2007 Escalade, A6
    Stock

  3. #3
    Tuner in Training
    Join Date
    Feb 2016
    Location
    Katy, Tx
    Posts
    27

    Tune up attached..

    Attached is the tune up that came with truck...





    1324260467 - 1 Original.hpt