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Thread: My VCM Scanner shows 0.5 AFR point leaner than actual gauge

  1. #1
    Advanced Tuner Boost's Avatar
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    Question My VCM Scanner shows 0.5 AFR point leaner than actual gauge

    I have latest 4.4.4 with MPVI2 Pro and Prolink, AEM gauge/sensor package

    I used the preset automatic transform and everything works, yet the actual AEM gauge is reading a half a point richer than the Scanner

    Obviously I am going to trust the info coming directly from the sensor

    Is it something with the wiring?

    How can I adjust this, someone please help
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  2. #2
    Advanced Tuner Boost's Avatar
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    So I'm being told that 0.5 off is normal for most widebands...
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  3. #3
    Advanced Tuner Boost's Avatar
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    fixed it... it anyone needs pointers hit me up
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  4. #4
    Tuning Addict 5FDP's Avatar
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    May 2012
    Location
    Rogers, MN
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    13,533
    You just adjusted the numbers for that specific channel right?

    I always played that game with doing widebands through the EGR.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
    Advanced Tuner Boost's Avatar
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    Quote Originally Posted by 5FDP View Post
    You just adjusted the numbers for that specific channel right?

    I always played that game with doing widebands through the EGR.
    yes sir it's perfect now
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado