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Thread: LS3 Swap from Salvage 2011 Camaro SS - Starts and Dies in seconds

  1. #1
    Potential Tuner 74Bird's Avatar
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    LS3 Swap from Salvage 2011 Camaro SS - Starts and Dies in seconds

    I am doing an LS3 swap from a salvaged 2011 Camaro SS. I have the engine, trans, ECM and BCM installed. I am using a new Holley fuel tank with pump and an external filter/regulator return. The engine starts and dies in seconds. If I leave the key in the ignition position for some time, it does not start. After it starts and dies, I need to wait to start again. Attached are the DTCs. Any help would be greatly appreciated.
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  2. #2
    Tuning Addict 5FDP's Avatar
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    Did you disabled the VATS in the OS tab, then do a write entire to remove it??
    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.

  3. #3
    Potential Tuner 74Bird's Avatar
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    Yes. VATs is disabled. But it will only start if I have the original key in the cylinder with the sensor hooked up. Not sure why. Attached is the file.
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  4. #4
    Tuning Addict 5FDP's Avatar
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    Disable the starter fault check and code P1631 as well.
    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.

  5. #5
    Potential Tuner 74Bird's Avatar
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    Sorry, I am new so to verify, the starter fault check is on the OS section and the P1631 is on the Engine Diagnostics section, DTC's tab, correct? Thanks

  6. #6
    Potential Tuner 74Bird's Avatar
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    Thank you very much for your help! I just figured out that I wasn't writing the whole file. It now runs with VATS disabled.

  7. #7
    Tuning Addict 5FDP's Avatar
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    Yup, a write calibration only is not enough for a VATS removal. Needs a full write entire.
    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.

  8. #8
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    5FDP, Is that just on the gen IV engines? I have a 2001 gen III that I did a calibration write only (vats disable) and it runs.

  9. #9
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    Quote Originally Posted by SteelGreenStallion View Post
    5FDP, Is that just on the gen IV engines? I have a 2001 gen III that I did a calibration write only (vats disable) and it runs.
    GEN 3 computers don't require the Write Entire procedure.