Really bad knock control?

  1. CivicOops

    CivicOops Member

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    I'm running the ktuner 21psi basemap on a Civic Hatchback Sport 6mt. Besides the tune my car is completely stock. And I always use 93 Octane gas from Exxon. Anyway my knock control seems to be really high and I think I can feel it too.

    -Under normal highway cruising with no heavy throttle it sits at about 0.65.

    -A single WOT 2nd to 4th gear pull will cause it to instantly go up to about 1.15 - 1.20.

    Is this normal? I've had people tell me it's bad.
     
  2. gtman

    gtman Senior Member

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    Has it been lower before and you are just now seeing these high numbers? If so, it could be a bad batch of gas. Are your ambient temps really high? Also, the base turbo models will go higher on a single WOT pull, but not that high.

    As far as it being "bad", those high numbers are robbing you of power but won't cause any sort of damage.
     
  3. OP
    CivicOops

    CivicOops Member

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    This is the first time I've looked at the numbers. I just got the car tuned a few days ago. Since then I think 0.65 knock control is the lowest I've ever seen it go and that's when im running on eco mode factory boost.
     
  4. PowerPerLiter

    PowerPerLiter Specific Output

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    Did someone "tune" the car (make custom adjustments for you) or is this car running just the starter 21psi map that ktuner provides?
     
  5. EastBayCivic

    EastBayCivic Senior Member

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    Just a guess... it's probably hot AF right now where you live. Knock control climbs way faster in heat
     
  6. theblackdogman

    theblackdogman Senior Member

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    It’s 97 here with 80% humidity and I’m consistently at .49
     
  7. 360glitch

    360glitch Moderator
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    Try different fuel. Unfortunately not all "93" is created equally.
     
  8. Miha__

    Miha__ Member

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    long term fuel trim ? short term fuel trim ?
     
  9. OP
    CivicOops

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    It is pretty hot. Gets to 100° every day. But I did my knock testing at night when it was 85°.
     
  10. OP
    CivicOops

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    What do you mean? I don't know what that is.
     
  11. Miha__

    Miha__ Member

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    if you are lean knock will rise.

    LTFT and STFT in your ktuner logs
     
  12. OP
    CivicOops

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    Well I have these STFTB and LTFTB gauges from tunerview. Is this what you were talking about? What it's showing right now is about what it averages at.
    Screenshot_20190815-122938.png
     
  13. turbociv910

    turbociv910 Senior Member

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    yeah thats really high, whats your wot af and timing
     
  14. gtman

    gtman Senior Member

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    #14 gtman, Aug 15, 2019
    Last edited: Aug 15, 2019
    Try gas from a different station and see what happens. If K. Control still is high, run a datalog and post it here.

    I'm fairly certain it's the gas. I had the same issue, switched stations, and all was good.
     
  15. Hollywoo0220

    Hollywoo0220 Customer Service oriented (most of the time) :-)

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    #15 Hollywoo0220, Aug 15, 2019
    Last edited: Aug 15, 2019
    First:
    Log some REAL TIME data and double check that the tuner view isn’t giving you a false read.
    Second:
    - Clean your MAF with ONLY “MAF Spray”
    - Check that you don’t have any Vacuum leaks in your system.
    Lastly: (EDIT)
    Your Bank #2 looks really low. You may have a faulty injector in Cylinder 3 or 4
    OR
    Check your spark plugs in those cylinders.
    AND
    Check your O2 and Sensor connections after the CAT Converter (that is your Bank 2).
     
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