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.
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HOMESERVICE MANUALSPONTIAC1998FIREBIRD V8-5.7L VIN GREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORSERVICE AND REPAIRTHROTTLE POSITION SENSOR (TPS) REPLACEMENT
1998 Pontiac Firebird V8-5.7L VIN G
Throttle Position Sensor (TPS) Replacement
1998 Pontiac Firebird V8-5.7L VIN GSECTION Throttle Position Sensor (TPS) Replacement
REMOVAL PROCEDURE
CAUTION: The TP sensor is an electrical component. Do not soak the TP sensor in any liquid cleaner or solvent as damage may result.
1. Disconnect the TP sensor electrical connector.
2. Remove the TP sensor attaching screws (5).
3. Remove the TP sensor (6).
4. Remove the TP sensor O-ring seal (7).
INSTALLATION PROCEDURE
1. Install the TP sensor O-ring seal (7) on the TP sensor (6).
2. Install the TP sensor (6) on the throttle body (1) with the throttle valve in the closed position. Make sure the TP sensor lever lines up with the TP sensor drive lever on the throttle shaft.
3. Install the TP sensor attaching screws (5).
Tighten
TP sensor screws to 2 Nm (18 lb in).
4. Connect the TP sensor electrical connector.
RENDER: 1.0x
NO RELATED
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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.