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Thread: 6.0L L92 heads, L76 test and tune

  1. #1
    Advanced Tuner 69lt1bird's Avatar
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    Oct 2007
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    NEWER LOG AND T6.0L L92 heads, L76 test and tune

    This is my first crack at tuning this setup, I have an issue with the pcm not going into closed loop by itself, I had to turn it on in the VCM Controls to get closed loop, I am not sure yet why that is happening. The scan is with the clsoe loop enabled. Please take a look for me and give me some pointers if you can. This is a short drive but the first time its been on the road with the new motor and trans.
    1969 Firebird
    LQ4
    L92 heads
    L76 intake
    Holley 90mm
    Hooker Long tubes
    39# svo injectors
    57 psi at the rail
    222_238 581 605 114 lsa+4
    10.8:1 compression ratio
    Built 4L60e
    3400 stall
    3.73 12 bolt
    Last edited by 69lt1bird; 05-18-2008 at 08:00 PM.

  2. #2
    Tuner in Training
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    Orlando, FL.
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    You have a problem in Bank 1. You car goes +25 in the LTFT's and 30+ in STFT's. You also have a ton of misfires. or reported misfires. Something is up, that may prevent the car from going into closed loop. Forcing it is not normally a good idea especially if there is a problem on one bank. You O2's may not be going "ready". Cant see it with your configuration file in the status bits section.
    1999 C5 LS1 M6. H/C

  3. #3
    Advanced Tuner 69lt1bird's Avatar
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    I did get a P0200 code, I am going out to look at that now. I did not get any misfire codes. I did not get a check engine light with the code. It is check in the DTC table. thanks for the feedback

  4. #4
    Advanced Tuner 69lt1bird's Avatar
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    Ignore the log and tune above. P0200 was set because #3 injector connector had a pin partially backed out so the injector was not getting a ground signal from the pcm. I will log more data a post it here. This engine runs very strong on a test drive today, it should be fun once tuned correctly.

    A new tune and log file are in the first post
    Last edited by 69lt1bird; 05-18-2008 at 08:01 PM.