Walker 200-91459 Throttle Position Sensor

Throttle Position Sensor for GM Applications

Walker Products FSK 200-91459 is a throttle position sensor for select 1988-1990 Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles. It provides a direct-fit engine management replacement for throttle position sensor service on applications such as the Chevrolet Camaro, Caprice, Firebird, and GMC G3500.

Key Features

• Throttle position sensor for emission control and engine management systems
• Walker Products FSK line replacement for select GM applications
• Built to meet or exceed OEM standards and specifications
• Supported by Walker Products engineering, product management, and technical documentation
• Fits 1990 Cadillac Brougham, N/A; 1988-1990 Chevrolet Camaro, N/A; 1989-1990 Chevrolet Caprice, N/A

Product Details

Walker Products has supplied fuel system and engine sensor components since 1946, and the FSK line focuses on dependable aftermarket engine management parts. Part number 200-91459 is a throttle position sensor used to report throttle angle to the vehicle’s control system, helping maintain proper fuel delivery and drivability across the listed GM fitments. This part cross-references Standard Ignition TH39 for the same application.

Additional fitment includes 1988-1990 Chevrolet G30, 1990 Chevrolet Lumina APV, 1990 Chevrolet P30, 1989-1990 Chevrolet R2500 Suburban, 1989-1990 Chevrolet R3500, 1990 Chevrolet V2500 Suburban, 1989-1990 Chevrolet V3500, 1988-1990 GMC G3500, 1990 GMC P3500, 1988-1990 GMC R2500 Suburban, 1988-1990 GMC R3500, 1988-1990 GMC V3500, 1990 Oldsmobile Silhouette, 1988-1990 Pontiac Firebird, and 1990 Pontiac Trans Sport.

Common Issues This Sensor Can Address

• Erratic throttle signal readings
• Hesitation during acceleration
• Rough idle caused by incorrect throttle input
• Delayed or inconsistent transmission response tied to throttle position data
• Check engine light concerns related to throttle position sensor performance

Installation Notes

Verify connector style, mounting location, and calibration requirements against the original sensor before installation. After replacement, clear diagnostic trouble codes if needed and confirm throttle signal output with a scan tool or multimeter. For best results, inspect the throttle body and related wiring for wear, corrosion, or contamination during service.

Quality Assurance

Walker Products manufactures engine sensors and fuel system components to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with in-house engineering and technical support used to maintain application accuracy and product quality.