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.
1990 Eagle Premier ESFACTORY OEM SERVICE PROCEDURE
Air Temperature Sensor Test
- Disconnect vacuum hose from air temperature sensor. Air temperature sensor is located in air cleaner. Connect a hand operated vacuum pump to vacuum source side of air temperature sensor and a vacuum gauge to vacuum motor side of sensor.
- With sensor temperature less than 50°F (10°C), apply 14 in. Hg vacuum to sensor. Vacuum should be maintained. Warm sensor to 70°F (21°C). Vacuum should not be maintained by sensor. Replace sensor if defective.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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