Sensor help requested

**CORNER CARVER** · September 13, 2017, 07:46 PM

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.

**McFred** · September 14, 2017, 07:59 AM

Looks like a 2 bar ac delco MAP sensor:

**CORNER CARVER** · September 14, 2017, 12:37 PM

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.

**2/3rdsCobra** · September 14, 2017, 02:05 PM

Perfect. Now I just have to find the vac signal line to plug it in.

**CORNER CARVER** · September 15, 2017, 05:33 AM

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.