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Thread: Throttle must be closing? Not showing on log

  1. #1

    Throttle must be closing? Not showing on log

    Hey guys,

    Ran across a weird one at the shop today. This truck was done about a year ago and has been working great up until recently. (2017 Cadillac Escalade with Magnuson 2300 and exhaust) When going full throttle it falls on its face around 5000rpm. All of the parameters in the log point towards an issue with the throttle closing. However, as you can see from the attached log, the throttle PIDS do not show it closing? Has anyone ran into this before? I did do some tweeking on the VTT to see if I could get it to stay open, however my usual method is not working.

    after tirepressure.hpl

    Thanks in advance,
    Ryan

  2. #2
    Senior Tuner 10_SS's Avatar
    Join Date
    Mar 2012
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    Detroit, MI
    Posts
    1,320
    Check the air filter? I had one collapsing on me. Do you have any other throttle PIDs not already logged?
    2010 Camaro LS3 (E38 ECU - Spark only). MS3X running complete RTT fuel control (wideband).
    Whipple 2.9L, 3.875" Pulley, kit injectors, supplied MSD Boost-A-Pump, stock pump
    LG Motorsports 1 7/8" Headers - No Cats, stock mid pipe with JBA Axle Back
    ZL1 Wheels/Tires

  3. #3
    Sorry for not replying earlier. Yep! We got it sorted out yesterday. Stock filter was collapsing. Good call 10_SS!