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 SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
1998 Pontiac Firebird V8-5.7L VIN G
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
1998 Pontiac Firebird V8-5.7L VIN GSECTION Service and Repair
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Raise the vehicle.
3. Drain the engine coolant. Refer to Engine/Engine Cooling.
4. Lower the vehicle.
5. Disconnect the electrical connector from the ECT sensor.
6. Remove the #1 spark plug wire from the spark plug.
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
7. Remove the ECT sensor.
INSTALLATION PROCEDURE
1. Coat the Engine Coolant Temperature (ECT) sensor threads with sealer P/N 12346004 or the equivalent.
2. Install the ECT sensor.
Tighten
ECT sensor to 23 Nm (17 lb ft).
3. Install the # 1 spark plug wire onto the spark plug.
4. Connect the ECT sensor electrical connector.
5. Refill the engine coolant. Cooling System
6. Start the engine and check for leaks.
7. Recheck the engine coolant level.
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.