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Thread: Empty Pins on ECU Harness

  1. #1
    Potential Tuner
    Join Date
    Sep 2019
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    Empty Pins on ECU Harness

    Is there a way to program or use the empty pins on the ECU for a wideband? instead of using the A/C pressure switch.
    Can't really find anything online, and wanted to know if anyone had done it. trying to tune a '98 Chevy with a built small block that my buddies dad had built.

    it has a carb cam which draws less vacuum so the VE table will be all screwed up right? that's why we want to tune it

    Any help appreciated

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
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    Rogers, MN
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    The computer itself was never designed for a wideband so it could never use it in that way.

    We can only use the AC pressure circuit or the EGR circuit to log the wideband in the logs so we can create a wideband AFR/Lambda error against the commanded AFR/Lambda.

    Then that error would be applied to the airflow model to correct the fueling in the MAF/VE.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

  3. #3
    Potential Tuner
    Join Date
    Sep 2019
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    Damn I thought I was on to something haha, guess not, oh well.
    Thanks for the help