Sensors


Water temp Throttle position

Air temp MAP

The SpeedPro / FelPro / F.A.S.T / unit uses commonly available GM sensors. The water and air temp sensors I bought from GM worked well, but the Throttle Position Sensor was made to mount on the opposite side from what I needed. A quick trip to the parts store fixed that! I had to make a bracket to mount it to the throttle plate, but I like this setup MUCH better than the one I made for the other system.

The air temp isn't being uilized in the ECM, so I haven't bothered to mount the sensor yet!

The MAP sensor (Manifold Absolute Pressure) tells the fuel injection unit how much vacuum or boost the engine has.