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Thread: TPS% value 1227747 ADX

  1. #31
    Fuel Injected! gregs78cam's Avatar
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    Quote Originally Posted by EagleMark View Post
    But are your datalogs from a 1227747? Mine are! Your 16197427 has a seperate datastream for TPS%
    Yes but the TPS VDC should be same (between the two) from idle to WOT. I am just saying that you should be a little closer to 5V at WOT.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  2. #32
    RIP EagleMark's Avatar
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    But to answer your question I screwed up...

    They change with position. At WOT, 4.26 volts it was 53. at .53 volt TPS it is 00 but inbetween are like 1d, 4f, OE and some other numbers.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  3. #33
    RIP EagleMark's Avatar
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    Quote Originally Posted by gregs78cam View Post
    Yes but the TPS VDC should be same (between the two) from idle to WOT. I am just saying that you should be a little closer to 5V at WOT.
    So then we should leave the equation for the full 5 volts?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #34
    RIP EagleMark's Avatar
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    Thanks to Greg for getting this project done! We now have an ADX that shows TPS in Volts and Percent!

    New ADX file will be in the 1227747 Information thread. It also now has a working Vacuum gauge and readings in list view!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  5. #35
    Fuel Injected! gregs78cam's Avatar
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    No problem, I went ahead and ran the numbers. for a max tps of 4.5Vthe equation becomes:

    (X -25.6) * .488281

    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  6. #36
    RIP EagleMark's Avatar
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    That's good because I checked my TPS at Wide Open which is about 1/16th to 1/8th inch past throttle blades being wide open and only got 4.45?

    When I looked at my MAP voltage reading, key on, engine off it was 4.45! So just because theres a 5 volt reference it looks like it does not use it all!

    With the new equation I get 93.9% at 4.26 volts where my WOT is!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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