FAST Map Sensor FAST 3 BarThese sensors, by monitoring intake manifold vacuum, measure the amount of load being placed on the engine. The MAP sensors relay engine load output to the ECU, which in turn adjusts fueling for optimum performance and economy. This MAP sensor has 3 weatherpack female terminals. Reads up to 43. 5 PSI. Use 308031 to adapt this sensor to a late model harness like EZ 2. 0 or XFI Sportsman