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.
1988 Chevrolet Sprint TurboFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor (CTS)
- Disconnect negative battery cable. Drain cooling system. Disconnect CTS coupler. Remove sensor from intake manifold. Connect ohmmeter to sensor. Immerse sensor tip into water.
- Gradually raise water temperature and read resistance on ohmmeter. See AIR & COOLANT TEMPERATURE RESISTANCE table. If resistance at each temperature is not equal to table reading, replace CTS.
AIR & COOLANT TEMPERATURE RESISTANCE
| Temperature | Ohms |
|---|---|
| 32°F (0°C) | 6000 |
| 68°F (20°C) | 3000 |
| 104°F (40°C) | 1500 |
| 140°F (60°C) | 700 |
| 176°F (80°C) | 400 |
| 212°F (100°C) | 200 |
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.