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Thread: spark retard issue silvrado 2011

  1. #1
    Tuner in Training
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    Angry spark retard issue silvrado 2011

    hello there

    I have an issue with this car it's retard the advance up to -20

    I can't see the problem ?!!




    see the log in attachment
    Attached Files Attached Files

  2. #2
    Tuner in Training
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    any thoght guys ??

  3. #3
    Post your tune. Why is it at 228 degrees?

  4. #4
    Tuner in Training
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    it's stock file i did't tune it

  5. #5
    Tuner in Training
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    abo waleed HD.hpl

    any Pro tuner can tell us where the problem is ?


    In the attachment log file

    I saw the MAF reading goes highter.

  6. #6
    Tuner in Training
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    stell looking...

  7. #7
    Potential Tuner
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    Are you able to post the tune file?

  8. #8
    Tuner in Training
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    Sure

    see the attachment
    Attached Files Attached Files

  9. #9
    Tuning Addict 5FDP's Avatar
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    You need to log all the channels that relate to spark timing.

    Anything that can pull timing is what you need to be logging. So any of the spark correction tables like the IAT, ECT, torque mngt.

    I can already tell you strictly based on the last log you are losing 13 degrees of timing from the IAT temps. The temps are around 125-135 degrees and that IAT spark table is pulling 10-13 degrees.

    I've never seen a command idle speed of 361rpm before either. I'd try asking for 600rpm all the time when it's warmed up too.
    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.

  10. #10
    Tuner in Training
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    thanks for lighting I'm working on it