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MAP wiring

This is a discussion on MAP wiring within the Computer & Tuning forums, part of the LSx Technical Help Section category; i need to wire a LS3 MAP pigtal onto my LS1 harness, does anyone have the diagram for the LS3 ...

  1. #1
    Member 2000dreambird's Avatar
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    MAP wiring

    i need to wire a LS3 MAP pigtal onto my LS1 harness, does anyone have the diagram for the LS3 MAP?

  2. #2
    Member 2000dreambird's Avatar
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    anyone????

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    Moderator Cutlass's Avatar
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    LS3 map
    Pin 1 - 5 volts - gray
    Pin 2 - Ground (low reference) - orange/black
    Pin 3 - Signal to PCM - light green

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    Member 2000dreambird's Avatar
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    Quote Originally Posted by Cutlass View Post
    LS3 map
    Pin 1 - 5 volts - gray
    Pin 2 - Ground (low reference) - orange/black
    Pin 3 - Signal to PCM - light green
    will the wires be the same color on the ls1 harness?

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    Moderator Cutlass's Avatar
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    yes I believe the wire colors are the same, but the LS3 sensor has them in a different order than the LS1

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    Thanks.

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    TunedbyFrost.com Tuner Frost's Avatar
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    Depending on your tuning platform, you may not be able to use it. It's offset and linear value are much different than the OEM genIII unit and you can't adjust those values in HPTuner's except for the boosted 2/3bar OS's.

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    Member 2000dreambird's Avatar
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    Quote Originally Posted by Frost View Post
    Depending on your tuning platform, you may not be able to use it. It's offset and linear value are much different than the OEM genIII unit and you can't adjust those values in HPTuner's except for the boosted 2/3bar OS's.
    all i know is my tuner will be putting in a OS for SD tuning i dont know if that effects how the MAP reads im a newbi to the as far as HPtuners goes

  9. #9
    TunedbyFrost.com Tuner Frost's Avatar
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    If you aren't boosted you are running 1bar SD, and the offset and linear cannot be set in the 1bar OS's. I'm just letting you know.

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    Member 2000dreambird's Avatar
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    Quote Originally Posted by Frost View Post
    If you aren't boosted you are running 1bar SD, and the offset and linear cannot be set in the 1bar OS's. I'm just letting you know.
    im not boosted , what should i run for a MAP?

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    Moderator Cutlass's Avatar
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    From what Frost said, I'm guessing a standard LS1 MAP sensor. What exactly are you doing to your car? Swapping in a LS3??

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    Quote Originally Posted by Cutlass View Post
    From what Frost said, I'm guessing a standard LS1 MAP sensor. What exactly are you doing to your car? Swapping in a LS3??
    i have a LS3,24x Crank, forged internals, steel rings, -10cc diamond pistons,LS3 heads,G6X3 Cam,stock LS3 intake and injectors,LS3 MAP. Kooks LT's, electric dumps before Magnaflow Catts.

    NW Throttle Body D.B.C

  13. #13
    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by Cutlass View Post
    From what Frost said, I'm guessing a standard LS1 MAP sensor. ...
    this

  14. #14
    Member 2000dreambird's Avatar
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    thanks

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    Member 2000dreambird's Avatar
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    does anyone have a easy fix to make the LS1 MAP fit in the intake?

  16. #16
    Moderator Cutlass's Avatar
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    I came across this on another website. Its clear, thin walled 3/8" tubing over the seal and a fabbed hold down bracket.




  17. #17
    Member 2000dreambird's Avatar
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    sweet man thanks ill try it out,,, to bad i already changed to the LS3 pigtail

  18. #18
    TunedbyFrost.com Tuner Frost's Avatar
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    Or just thread a brass barb into the intake and run a line over to the LS1 sensor.


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