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Ford Coolant and Air Charge Temperature Sensors:
Category: Engine Control
Tip: When the ECT (water temp sensor) goes bad, the car runs bad when cold.
These are the temperature vs. resistance values for common Ford coolant and air charge temperature (ECT & ACT) sensors on 5.0s. The ACT on a 2.3 turbo is different.
Temperature in degrees Fahrenheit vs. Resistance in Ohms +/- 50 ohms
180=3600
185=3375
190=3150
195=2925
200=2700
205=2475
210=2250
215=2025
220=1800