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Thread: Can you see why this car never goes into closed loop?

  1. #1
    Senior Tuner
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    Can you see why this car never goes into closed loop?

    Because I havent been able to figure it
    Attached Files Attached Files
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  2. #2
    Advanced Tuner
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    You have your LTFT enabled and your STFT disabled, shouldn't that be the other way around?

  3. #3
    What is closed loop?

  4. #4
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    Thats disabled in openloop. I want full closed loop operation, but I can enable that as well and see
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  5. #5
    Tuner POWERZONE's Avatar
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    HOUSTON,TX
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    Go to

    Engine>Fuel>Open/closed loop>closed loop proportional
    *Set this table back to stock

    Engine>Fuel>Open/closed loop>airflow mode
    *Set this table back to stock


    Try this and see if this works.
    POWERZONE- AUTOMOTIVE PERFORMANCE AND TUNING SOLUTIONS
    STREET TUNING/DYNO TUNING/TRACK TUNING/REMOTE TUNING/EMAIL TUNING
    [email protected]

  6. #6
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    Quote Originally Posted by POWERZONE View Post
    Go to

    Engine>Fuel>Open/closed loop>closed loop proportional
    *Set this table back to stock

    Engine>Fuel>Open/closed loop>airflow mode
    *Set this table back to stock


    Try this and see if this works.
    Those tables are stock in the file he posted.

    Quote Originally Posted by GrannySShifting View Post
    Because I havent been able to figure it
    You have no O2 sensor activity. They look to be either unplugged or dead sensors. You should be setting inactivity codes for B1S1 and B2S1. It will not enter closed loop with no O2 activity or with S1 O2 codes set. Log Fuel System Status and see if it is in OL Fault.

  7. #7
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    ^^What he said and same answer as last time you asked. Its not the tune. Its wiring or 02 sensors or pcm related.

  8. #8
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    2*LS1 is right , check your 02's either not connected or their finished....Your dtc's should be setting inactivity for both banks....he is right no activity no closed loop operation...Good point click on status see what that is reporting....Cheers Bret@ultimatelsxtuning

  9. #9
    Tuner POWERZONE's Avatar
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    Quote Originally Posted by 2xLS1 View Post
    Those tables are stock in the file he posted.
    Ok. I compared a 99 auto file vs. 99 manual file. The auto tables are different.
    POWERZONE- AUTOMOTIVE PERFORMANCE AND TUNING SOLUTIONS
    STREET TUNING/DYNO TUNING/TRACK TUNING/REMOTE TUNING/EMAIL TUNING
    [email protected]

  10. #10
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    Thats what I thought, but the guy insists he has power and ground on the right circuits, continuity to the pcm on the signals and two brand new O2s!
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  11. #11
    Potential Tuner
    Join Date
    May 2014
    Posts
    8
    I know this is an old thread, but I?m having the same issue and can?t figure out what is causing it. I have new sensors installed. They seem to be getting power. No codes. Won?t go into closed loop.

  12. #12
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    Quote Originally Posted by rijrunr View Post
    I know this is an old thread, but I?m having the same issue and can?t figure out what is causing it. I have new sensors installed. They seem to be getting power. No codes. Won?t go into closed loop.
    I was never able to figure this one out
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere