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Thread: help! 5.3 swap not running

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  1. #1
    Join Date
    Aug 2008
    Location
    ontario, Canada
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    26

    Unhappy help! 5.3 swap not running

    I just swapped a 5.3 into my 94 obs and it won't run. it fires up then shuts off right away. i don't have any o2 sensors hooked up yet, I'm not sure if that could be an issue. Does anyone have any clue what it might be? or what I should look at.

  2. #2
    Join Date
    Dec 2008
    Location
    san antonio TX
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    1,365
    it sounds like the VATS are not disabled.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  3. #3
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    VATS is still enabled in the PCM. You have to get someone to turn it off.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
    Join Date
    Aug 2008
    Location
    ontario, Canada
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    what has to be done to shut them off. can i use a tech 2 or some sort of tuner?

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,540
    EFI Live or HPTUNERS
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Jan 2008
    Posts
    8,031
    whats vats?

  7. #7
    Join Date
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    Denton Texas
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    20,540
    vehicle anti-theft system
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  8. #8
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    VATS is chip key. You need PassLock disabled in the tune.

  9. #9
    Can i use the trialversion of EFILive to disconnect VATS??

  10. #10
    Join Date
    Feb 2009
    Location
    mississippi
    Posts
    930
    Quote Originally Posted by GasGuzzler View Post
    VATS is chip key. You need PassLock disabled in the tune.
    gas iv seen you post this like 8 times and your right vats is chip key passlock is what we have but in hp tuner and if im not crazin i think efilive calls it vats thats why every one calls it vats
    04 1500 5.3L custom hp tuners tune by myself don have a pic of it yet so hear is my old 01 chevy 5.3 460hp 13.669 @ 116

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