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Thread: Looking for the pids for 2018 mustang EcoBoost map afr reading are of

  1. #1
    Potential Tuner
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    Sep 2018
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    Looking for the pids for 2018 mustang EcoBoost map afr reading are of

    Need all the pids for it I can get good reading from mine alway read 38 psi running 25 in the OEM gauge I try other gauge its the same way. map reading are so off ?

  2. #2
    Tuner in Training qck2spool's Avatar
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    Apr 2017
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    Quote Originally Posted by frankcms View Post
    Need all the pids for it I can get good reading from mine alway read 38 psi running 25 in the OEM gauge I try other gauge its the same way. map reading are so off ?
    If you minus atmospheric pressure you’re at about 23.3 psi which will look pretty close to 25 on the stock gauge.

  3. #3
    Potential Tuner
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    Lol no stock psi

  4. #4
    Potential Tuner
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    Problem is map sensor pid in hp tunner is reading wrong not the sensor inself

  5. #5
    The map sensor reads absolute pressure. That is why it is called manifold absolute pressure. Turn the key on without the car running, and it will read 14.4 to 14.6 psi. So it is reading correctly, you are looking for boost pressure...to get that from a map reading, you have to subtract your barometric pressure. Qck2spool is right.