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How do you fix the fuel gauge and temperature on a 1991 Ford Ranger?

To fix the fuel gauge and temperature on a 1991 Ford Ranger:

Fuel gauge:

1. Check the fuel level sensor

2. Look for a faulty fuel gauge sending unit

3. Inspect the fuel tank for damage

4. Clean the ground connection

5. Check for a faulty instrument cluster

Temperature sensor:

1. Check the temperature sensor connector

2. Replace the temperature sensor

3. Check the wiring harness

4. Check the instrument cluster