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Thread: Sensor help requested

  1. #11
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    It looks like a MAP sensor, but not connected to a source would only read atmospheric pressure. The part number would be under the black mounting strap.

  2. #12
    Lepton McFred's Avatar
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    Looks like a 2 bar ac delco MAP sensor:


  3. #13
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    It is listed as a MAP sensor for some vehicles. On a 2004-2007 ION & 2005-2007 COBALT -2.0 LSJ- it is listed as a BARO PRESS SENSOR. Seems like on naturally aspirated cars its a MAP but on forced induction cars it a barometric pressure sensor. There will also be a MAP sensor for actual engine mapping? But this one is for altitude adjustment for engine mapping.

  4. #14
    Electron 2/3rdsCobra's Avatar
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    Perfect. Now I just have to find the vac signal line to plug it in.

  5. #15
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    It should not have any vacuum signal line attached. It is open to atmosphere so the PCM can get a reading of your "altitude". Air is thinner at higher elevation so the fuel mapping would have to vary to compensate for more or less oxygen to burn. In a nut shell, there is no line attached.

  6. #16
    Electron 2/3rdsCobra's Avatar
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    Got it, makes perfect sense.

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