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.
1991 Ford Taurus L4-153 2.5L HSCFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor: Service and Repair
Throttle Body:
1. Disconnect the Throttle Position (TP) sensor from the wiring harness.
2. If you are reinstalling the same sensor, scribe marks on the throttle body and on the TP sensor to assist with alignment during installation.
3. Remove the TP sensor retaining screws and remove the TP sensor.
4. Install the TP sensor, ensuring that the rotary tangs on the sensor are in proper alignment and the wires are pointing down.
CAUTION: Slide rotary tangs into position over throttle shaft blade, then rotate TP sensor CLOCKWISE to installed position. Failure to install the TP sensor in this manner may result in excessive idle speeds.
6. If reinstalling the old sensor, align the scribe marks from step 2.
6. Install and tighten the retaining screws to 25-30 lbs. in. (2.8-3.8 N-m).
7. Connect the wiring harness to the TP sensor.
NOTE: The throttle position sensor is not adjustable.
Factory Service Tools
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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.