Throttle position sensors measures throttle position through changing voltage and sends this information to the onboard computer. The computer uses this and other inputs to calculate the correct amount of fuel delivered. Symptoms of failure include poor starting, improper automatic transmission converter lockup, engine stumbling, stalling, and or a check engine light. There is no scheduled service for TPS sensors. Sensors are non-serviceable and must be replaced when failure occurs. Walker Products began supplying the fuel system needs of the automotive industry in 1946. Today Walker is one of the largest, privately owned manufacturers of fuel system components and engine sensors, and has served the needs of the worldwide automotive aftermarket. We are committed to supplying products manufactured to meet or exceed OEM standards and specifications. This effort is backed by our own manufacturing, product management and engineering staff to ensure it is maintained and accurate in the production of quality parts, vehicle applications, instruction sheets and technical support. Our products include Carburetor and Fuel Injection Repair Kits, Oxygen Sensors and other Engine Management products such as Throttle Position Sensors, Cam and Crankshaft Sensors, Fuel Injectors, Spark Plug Wires and Gaskets. As an ISO 9001:2015/TS16949 certified company, we are committed to supplying the highest quality products. Fit: Ford Aerostar 1995-1987, Ford Bronco 1992-1987, Ford Bronco II 1990-1987, Ford Crown Victoria 1994-1992, Ford E-150 Econoline 1991-1987, Ford E-150 Econoline 1995, Ford E-150 Econoline Club Wagon 1995-1987, Ford E-250 Econoline 1995-1987, Ford E-250 Econoline Club Wagon 1991-1987, Ford E-350 Econoline 1995-1988, Ford E-350 Econoline Club Wagon 1995-1988, Ford F53 1994-1988, Ford F-150 1995-1987, Ford F-250 1995-1987, Ford F-350 1991-1988, Ford F-350 1994-1993, Ford Mustang 1993-1991, Ford Probe 1992-1990, Ford Ranger 1994-1984, Ford Taurus 1995-1987, Ford Tempo 1994-1992, Lincoln Town Car 1994-1991, Mazda B2300 1994, Mazda B3000 1994, Mercury Grand Marquis 1994-1992, Mercury Sable 1995-1987, Mercury Topaz 1994-1992