Standard Ignition TH27 Throttle Position Sensor

Throttle Position Sensor for OE-Style Output

Standard Ignition TH27 is a throttle position sensor built for direct replacement service on a wide range of older GM and Jeep applications. It uses a fixed installed output to match OE calibration, helping maintain accurate throttle signal feedback for drivability and emission control.

Key Features

• Female connector with a plug-in design for straightforward electrical connection
• 3 female bullet terminals for the specified application
• Flexible polyimide film or ceramic-based circuit construction for dimensional stability
• Noble metal contact materials to support low resistance and long service life
• Integral rotor bearings and return springs for consistent throttle movement
• End-of-line testing with thousands of data points to verify output voltage

Detailed Product Overview

The Standard Ignition TH27 throttle position sensor is engineered for vehicles that need accurate throttle angle reporting to the engine control system. By maintaining a specific installed output rather than using an adjustable consolidated design, TH27 helps preserve OE-style signal behavior. This matters on applications such as 1982-1986 Buick Century, 1982-1986 Chevrolet Celebrity, 1984-1986 Jeep Cherokee, and 1982-1985 Chevrolet S10, where stable TPS output supports smooth throttle response and proper fuel management. Standard Ignition TH27 is also listed for 1982-1984 Pontiac Firebird and 1983-1985 GMC S15 Jimmy applications.

This part cross-references Gates 38003 and Walker Products 200-1003 for the same application.

What It Helps Address

• Erratic throttle signal readings
• Hesitation or poor throttle response
• Rough idle caused by inconsistent TPS output
• Check engine light concerns related to throttle position feedback
• Driveability issues on older emission-controlled vehicles

Installation Notes and Tips

Verify connector style, terminal count, and mounting alignment before installation. The TH27 uses a female plug-in connector with 3 female bullet terminals, so the harness and sensor interface must match the vehicle’s original configuration. Confirm throttle linkage movement is smooth and inspect the throttle body for wear or contamination before final setup. For fitment verification, match the vehicle application exactly, including model year and engine management configuration.

Quality Assurance

Standard Ignition maintains manufacturing quality control from component selection through finished product testing. Each sensor is validated at the end of the line to confirm output voltage performance, and the circuit design uses stable materials to help reduce electrical drift over time.