Expedition 2WD V8-4.6L SOHC VIN W (2000)
Engine Temperature Sensor: Description and Operation
The CHT sensor:
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is mounted into the wall of the cylinder head and is not connected to any coolant passages.
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sends a signal to the PCM indicating cylinder head temperature.
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If the temperature exceeds 130°C (265°F), the PCM disables four fuel injectors at a time. The PCM will alternate which four fuel injectors are
disabled every 32 engine cycles. The four cylinders the are not being fuel injected act as air pumps to aid in cooling the engine.
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If the temperature exceeds 166°C (330°F), the PCM disables all of the fuel injectors until the engine temperature drops below 153°C (308°F).
