Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Throttle Position Sensor
The Throttle Position Sensor (TPS) assembly consists of an idle switch, used to determine idle position, and a throttle position switch used to sense pre-wide open throttle (WOT) and WOT position.
The TPS is connected to throttle shaft of carburetor and provides a voltage which is a function of throttle angle.
TPS voltage enables ECM to read throttle position so ECM can sense pre-WOT and WOT position. The purpose of using TPS for a manual transmission is to inform ECM of engine load for gear shift indicator light system.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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