i am new a theese sensors although i a have been reading everything i can get my hands on i cant see any reference to my next question there is a sensor located paasenger side fire wall looks alot like a MAP sensor but that is on the drivers side fire wall can anyone tell what sensor is thanks:hail:

 

A sensor in the firewall? are you sure?

 

that is the barometric pressure sensor, it measures the outside air pressure and the computer uses it to compare what the MAP sensor reads to make fuel ratio/timming changes.

 

i thought it was the barometric sensor the other day i tried to buy a new one at Autozone and they said that my car did not have one Thanks

 

Not all cars had one... you may have a California car, but their books show a Federal car, or some one of that type of things.

It's actually the same sensor as a MAP sensor though, it's just hooked up (unhooked up?) to measure atmospheric pressure instead of the pressure in the manifold.

 

ACTUALLY, theyr'e not the same sensor. the recepticle for the wiring plug has a different "KEY" position ffrom the other. if you look into the hole you can see the plastic "KEY".

I know from experiance that you cannot interchange the two sensors due to the "KEY" configuration.