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Thread: e38 No Start

  1. #1
    Tuner in Training
    Join Date
    Feb 2020
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    The Woodlands, TX
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    e38 No Start

    Before I get too far in the weeds here....

    2010 5.3L/6L80, e38 (LS swap 85' C10)

    VATS 1, 2, and Starter Fault disabled.

    I have 52psi fuel pressure and good crank signal - Scanner shows rpm when cranking
    I have 4.2V on pins A/C at the cam sensor. I believe I should be seeing 4.8-5.5V here?
    I can see the sensor, but don't get count. I throw a fault code when I unplug the sensor too.

    I don't have... Inj pulse, cam sensor signal, and spark.


    My question
    ....I assume inj pulse is an output from ecm and spark is also dependent upon crank/cam signals. I believe I should be seeing 4.8-5.5V at cam sensor. All grounds and 5v references at APP sens and TB have shown good. Am I missing something in the tune that would cause this no start issue?

    2010 E38 Tune1.hpt

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,559
    Did you "write entire" when you disabled the VATS?
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.