TPS Sensor for 112-578 Throttle Body

The TPS Sensor for 112-578 Throttle Body by Holley is a precision throttle position sensor engineered for the Holley 2000 CFM Dominator fuel-injected throttle body. This component is essential for carbureted and fuel-injection conversion builds where accurate throttle plate position feedback is critical to engine management and performance tuning. The TPS sensor serves as the electronic link between driver input and engine control systems, enabling real-time monitoring of throttle opening and closing for optimal air-fuel delivery.

This throttle position sensor utilizes variable resistive technology to provide continuous analog feedback as the throttle plate moves through its range of motion. Housed in a compact 3.6 x 2.6 x 3.7 inch assembly weighing just 0.1 lbs, the sensor mounts directly to the Holley 112-578 throttle body specification, ensuring perfect fitment without modification. The robust design withstands engine bay heat and vibration while delivering consistent, repeatable output signals that modern EFI controllers and tuning platforms rely on for closed-loop fuel delivery, idle stability, and acceleration enrichment mapping.

Engine builders, LS swappers, and carb-to-EFI conversion specialists benefit most from this sensor when retrofitting the Holley Dominator throttle body into street rods, classic trucks, and high-performance platforms. Installation is straightforward—the sensor mounts to the throttle body housing with no drilling or adapters required for the 112-578 application. Compatible with standalone EFI systems and factory engine computers that support variable TPS input, this Holley OEM part ensures your fuel injection system responds accurately to throttle commands and maintains driveability across idle, cruise, and wide-open-throttle conditions.