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Thread: cos3 semi closed loop

  1. #1
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    Default cos3 semi closed loop

    my 2001 silverado that has cos3 in it will not go into semi closed loop. ive read all the forums and tried a buntch of stuff and still no luck. im tryin to get stft and the only way ive been able to do that is by putting it into full closed loop. any ideas?

  2. #2
    Lifetime Member hquick's Avatar
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    Post your tune.
    Howard

    YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
    MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
    DUCT TAPE.
    IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.


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    here it is
    Attached Files Attached Files

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    Lifetime Member 5.7ute's Avatar
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    Check out A0008 where you reach operating temp. Its influence will prevent stoich from being commanded which is necessary for semi closed loop. Try setting this to 1.00 from 70 degC & see how that goes.
    The Tremor at AIR

  5. #5
    Joe (Moderator) joecar's Avatar
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    Fix these up:

    Out of Range calibration summary: 09:16:48 pm, Tuesday Apr 21, 2009

    EFILive Custom Calibrations
    {A0001} Forced Octane Scaler Percentage, was out of range when loaded.
    {A0002} Octane Scaler Limiter, was out of range when loaded.

    Engine Calibration.AIR Pump
    {B0203} AIR Pump Coolant Temp Disable, was out of range when loaded.

  6. #6
    Joe (Moderator) joecar's Avatar
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    +1 on what 5.7ute said about A0008 (which is a multiplier to B3647).

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    you guys are frikin great i did what you said and it now uses stft thanks a million

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    Lifetime Member 5.7ute's Avatar
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    No worries, glad you got it sorted.
    The Tremor at AIR

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    Now that we are on the subject...

    It bothers me that with the STFTs only they will cycle to 0 every once in a while and when you read the wideband its a bit inconsistent with the fueling.
    "All that is needed for the triumph of evil is that good men do nothing..."

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    Lifetime Member 5.7ute's Avatar
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    Quote Originally Posted by Highlander View Post
    Now that we are on the subject...

    It bothers me that with the STFTs only they will cycle to 0 every once in a while and when you read the wideband its a bit inconsistent with the fueling.
    Do you have any logs of this occuring you can post?
    I assume this is occuring even with the switch points dialled in to the wideband.
    The Tremor at AIR

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