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.
2000 Pontiac Firefly (CANADA) L4-1.3LFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor: Service and Repair
REMOVAL PROCEDURE
1. Remove the bolt from the air inlet duct resonator to the air intake box.
2. Loosen the hose clamp on the resonator pipe and swing the pipe out of the way.
3. Disconnect the electrical connector from the Throttle Position (TP) sensor.
4. Remove the 2 screws and the IP sensor from the throttle body.
INSTALLATION PROCEDURE
1. Align the TP sensor (3) to the throttle body with the TP sensor's upper screw hole (1) slightly ahead of the hole on the throttle body (2). This will correctly engage the throttle lever tab with the TP sensor movement.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Rotate the TP sensor (1) rearward in order to align the screw holes, and install the 2 screws.
Tighten
Tighten the screws to 2.0 N.m (18 lb in).
3. Connect the TP sensor electrical connector.
4. Attach the resonator pipe to the air intake box, and secure the pipe with one bolt.
5. Tighten the hose clamp on the resonator.
1. Remove the bolt from the air inlet duct resonator to the air intake box.
2. Loosen the hose clamp on the resonator pipe and swing the pipe out of the way.
3. Disconnect the electrical connector from the Throttle Position (TP) sensor.
4. Remove the 2 screws and the IP sensor from the throttle body.
INSTALLATION PROCEDURE
1. Align the TP sensor (3) to the throttle body with the TP sensor's upper screw hole (1) slightly ahead of the hole on the throttle body (2). This will correctly engage the throttle lever tab with the TP sensor movement.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Rotate the TP sensor (1) rearward in order to align the screw holes, and install the 2 screws.
Tighten
Tighten the screws to 2.0 N.m (18 lb in).
3. Connect the TP sensor electrical connector.
4. Attach the resonator pipe to the air intake box, and secure the pipe with one bolt.
5. Tighten the hose clamp on the resonator.
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.