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Thread: E38 / E67 VATS disable guide

  1. #1
    Forum tyhee Site Admin GMPX's Avatar
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    Default E38 / E67 VATS disable guide

    Hi all,

    Seems to be a number of people having problems with VATS on the E38, it's getting too confusing to keep track of all the different threads so I feel it's time to make a new thread that will become a sticky for future reference.

    So far we have people saying they can apply the VATS patch and the engine will fire right up. Others, no matter what they do the engine will not fire.

    I would like to get a quick summary from people that have got an E38 (or E67) running outside of a GM platform to post up what they have done (aside from the VATS patch). Did you need to put a relay on the starter output? Was it a manual or auto program? Things like that.

    Once we have some definitive answers I'll edit the thread and make this a sticky.

    Cheers,
    Ross
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
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  2. #2
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    Ross, maybe add to your original post what OS they're running too? That seems to make a difference...

    (Feel free to delete this)
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
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    12607218 - VATS patch only required (OS default is VATS Type 3)
    12612381 - VATS patch only required (OS default is VATS Type 2)
    12619078 - VATS patch only required (OS default is VATS Type 2)
    12624402 - VATS patch only required (OS default is VATS Type 2)
    12614088 - VATS patch + VATS Type 2 + Crank Relay current (added 3/23)
    12617631 - VATS patch + VATS Type 2 + Crank Relay current
    12628990 - VATS patch + VATS Type 2 + Crank Relay current (depends on platform OS is used on - some do not require crank relay current).

    Last edited by gmh308; August 8th, 2010 at 11:43 AM. Reason: Editing........ :)

  4. #4

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    Ross,

    Can you better explain what happens when the VATS patch is applied?

    HT

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    Forum tyhee Site Admin GMPX's Avatar
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    Sure, the ECM goes through many routines to determine if the vehicle can start or not. We still allow the ECM to try to figure out if it's ok to start, however, where it reaches the decision point of start ok or no start we simply force both options to start ok.
    So even if the ECM has determined the engine cannot run when it goes to disable the spark and fuel it is forced back to the ok to start condition.
    Well, that is the theory behind it anyway, I am getting the feeling that as the years progress there might be other new checks the ECM performs that we might not be bypassing. Look at the summary by OS from gmh308.

    Cheers,
    Ross
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


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    Default

    Added 12614088.

  7. #7
    Forum tyhee Site Admin GMPX's Avatar
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    The ones that you listed as 'start on second key on', is this just the initial start after applying the patch and flashing or is this for every start afterwards?
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


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    Quote Originally Posted by GMPX View Post
    The ones that you listed as 'start on second key on', is this just the initial start after applying the patch and flashing or is this for every start afterwards?
    Just ran these through again and they start first key on. That was with a warm engine and stoich set at 9.8 for ethanol. Maybe it was a cold start fueling issue in the past that just looked like no start initially. And it was only on cold boot/flash that they kicked on second key on. Subsequent starts AOK. Will try the cold start tomorrow if time.

  9. #9
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    Quote Originally Posted by gmh308 View Post
    12607218 - VATS patch only required (OS default is VATS Type 3)
    12612381 - VATS patch only required (OS default is VATS Type 2)
    12619078 - VATS patch only required (OS default is VATS Type 2) See Note
    12624402 - VATS patch only required (OS default is VATS Type 2)
    12614088 - VATS patch + VATS Type 2 + Crank Relay current (added 3/23)
    12617631 - VATS patch + VATS Type 2 + Crank Relay current
    12628990 - VATS patch + VATS Type 2 + Crank Relay current

    Note:

    12619078 - depends on what vehicle the overall calibration is for. Some require crank relay current (Chev Truck), some dont (G8/VE/Middle East Chev).

  10. #10
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    As a side note; I just installed a 2009 Silverado 5.3 in a Jeep JK. I was fortunate to have got the engine compartment fuse block with all the relay's and fuses.

    I applied the Vats patch and powered the starter relay trigger as the ECM does - no start, code P0615.

    I simply left the Chevy starter relay in place and powered the starter solinoid from the Jeep starter relay and it starts every time. It appears the ECM monitoring of the starter relay trigger must remain unaltered.

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