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Thread: E92 GMC missing table

  1. #1
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    Default E92 GMC missing table

    Greetings ,

    I just noticed that there's a missing table that keeps playing with timing on GMC pickups , I used to tune them with hptuners without any problems .

    It's related to humidity and it was labeled as " VCP humidity adder dry " in HPT , even though there are humidity spark and multiplier in efilive , none of them did the trick and I had to use HPT .

    Please add this table .

    Attached stock file .E92 GMC.ctz

  2. #2
    Lifetime Member GMPX's Avatar
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    So there is a spark and multiplier already, what does the missing table do, add additional timing over the base humidity spark?
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
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    Quote Originally Posted by GMPX View Post
    So there is a spark and multiplier already, what does the missing table do, add additional timing over the base humidity spark?
    No idea , but it adds additional timing to main spark table .


    Click image for larger version. 

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    The tables highlighted by green are the ones that available in efilive but the ones in red are the missing ones which have the major affect .

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    Lifetime Member GMPX's Avatar
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    Ok I pass it on to the guy mapping these, hopefully they are not too hard to locate and figure out.
    I no longer monitor the forum, please either post your question or create a support ticket.

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    Quote Originally Posted by GMPX View Post
    Ok I pass it on to the guy mapping these, hopefully they are not too hard to locate and figure out.
    Hope so , thank you for your help .

    The question is why most cars aren't affected by those missing tables , like (CTS-V , corvette , camaro , etc ) ? I have only seen them doing work on trucks.

  6. #6
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    Quote Originally Posted by GMPX View Post
    Ok I pass it on to the guy mapping these, hopefully they are not too hard to locate and figure out.
    Any updates on this ?

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    I'm still having this problem and the latest update didn't solve it , the tables are still missing .

  8. #8
    Lifetime Member wesam's Avatar
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    Quote Originally Posted by Eng.LSX View Post
    Hope so , thank you for your help .

    The question is why most cars aren't affected by those missing tables , like (CTS-V , corvette , camaro , etc ) ? I have only seen them doing work on trucks.
    I noticed the same thing in 2015+ truck only
    Not in Camaro nor Corvettes
    The timing will be 4-5 degrees less than the high octan table after flashing the ECM and never found the table which cause this
    EFILive Tuner

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    Quote Originally Posted by wesam View Post
    I noticed the same thing in 2015+ truck only
    Not in Camaro nor Corvettes
    The timing will be 4-5 degrees less than the high octan table after flashing the ECM and never found the table which cause this
    That what I was getting first but then I've narrowed it down to 2 degrees less the the main spark which lead me to the missing table that I found using hptuners , which related to humidity .

    And yes it's only with the trucks , too bad HPT is way ahead now a days .

  10. #10
    Lifetime Member wesam's Avatar
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    The problem is the spark will go back to the high Octane after nearlly 20 min of driving
    And yes I tried adjusting the octane scaller without luck
    So there is a table thats a time dependant which will cause the timing to be decreased for arround 20 mins after ECM reflash
    EFILive Tuner

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