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Thread: First drive - TPI truck

  1. #1
    Fuel Injected!
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    First drive - TPI truck

    It seems to drive fairly well. I logged data to my tablet as a drove around for about 5 minutes, then just looked over the CSV tonight out of curiosity. I dont have anything to diagnose, but I noticed these fuel trim numbers. If they are normal then Ill ignore it. If not then Ill learn tunerpro and dig deeper.
    Attached is just a simple graph of the INT and BLM values from the values the app dumps to a CSV.
    Attached Images Attached Images

    1992 Camaro Z28 5.7
    1995 Silverado 5.7

  2. #2
    Super Moderator dave w's Avatar
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    The BLM's would ideally average 128. By the looks of the posted graph, it seems likely the BLM's are averaging less than 128. BLM's below 128 are rich and BLM above 128 are lean. Overall, the csv indicates the truck is running rich.

    dave w

  3. #3
    Fuel Injected!
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    Thanks. 105-110 is low enough to worry about?
    I don't know if it matters, but the EGR is disabled.

    1992 Camaro Z28 5.7
    1995 Silverado 5.7

  4. #4
    Super Moderator dave w's Avatar
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    Quote Originally Posted by pro View Post
    Thanks. 105-110 is low enough to worry about?
    I don't know if it matters, but the EGR is disabled.
    I think 105 - 110 is to low, I think 118 - 138 is acceptable. The closer to 128 the better.

    dave w

  5. #5
    Fuel Injected!
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    Would you also recommend lowering the values in the VE table (I suppose it's idle VE vs MAP vs RPM)?
    In looking at more data, in most of the cases where BLM was at 110 and near 105, MAP was around 35, and RPM 650-800. Thats only a few cells in the attached table correct? Do the values in this table not seem to be a bit high in the first place?
    Attached Images Attached Images

    1992 Camaro Z28 5.7
    1995 Silverado 5.7

  6. #6
    Super Moderator dave w's Avatar
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    I think using the Log File Analyzer posted in this thread will be very helpful: http://www.gearhead-efi.com/Fuel-Inj...-File-Analyzer

    I've been very successful tuning TPI with the Log File Analyzer.

    dave w
    Last edited by dave w; 6 Days Ago at 04:07 AM.

  7. #7
    Fuel Injected!
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    Quote Originally Posted by dave w View Post
    I think using the Log File Analyzer posted in this thread will be very helpful: http://www.gearhead-efi.com/Fuel-Inj...-File-Analyzer

    I've been very successful tuning TPI with the Log File Analyzer.

    dave w
    I believe he is still running the 1993-1995 TBI PCM to run the TPI. He would be running a $0D setup, not $8D.

  8. #8
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Fast355 View Post
    I believe he is still running the 1993-1995 TBI PCM to run the TPI. He would be running a $0D setup, not $8D.
    If using $OD, then there is the option to use the Wide Band O2 spreadsheet posted in this thread; http://www.gearhead-efi.com/Fuel-Inj...g)-Spreadsheet Requires installing a Wide Band O2. Instructions for setting up $OD for Wide Band O2 data logging is included in the .zip file.

    dave w

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