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 (TPS)
This sensor is mounted on side of carburetor, and is coupled to throttle shaft. See Figure. The ECA applies a 9-volt reference voltage to throttle position sensor and classifies resultant output voltage into 1 of 3 positions: closed throttle (idle or deceleration), part throttle, or wide open throttle (maximum acceleration). This information is used by ECA to determine proper amount of spark advance, EGR flow, and Thermactor air injection mode.
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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