In an attempt to use the kewl unbiased forum more I will ask here...

AEM 3.5 bar map sensor. Which wire goes where when wiring it in?

Red is 5.0 volt power, Black is ground, and your third wire is the signal (Green or white)

Thanks. I connect it to the three wires connected to the original map sensor bolted to the intake mani on the engine side?

Thanks again.

1= ground, 2 = signal, 3= 5 volt power. The picture is of a GM 3-bar map, but you get the idea...

So this it the wiring diagram of the MAP sensor! Now it's clear how it works and connected to the factory pressure sensor plug.

MAP Sensor (http://www.carpartswholesale.com/cpw/map_sensor.html)