1994 Ford Truck E150 1/2 ton Van 5.8L MFI 8cyl Temperature Switch is located:
Front seating area, center, under engine cover, front
driver side of intake manifold, mounted in engine
block.
The ECT sensor (Engine Coolant Temperature Sensor) is located either in the heater supply tube at the rear
of the engine, or in the lower intake manifold. The ECT sensor is a
thermistor (changes resistance as temperature changes). The sensor
detects the temperature of engine coolant and provides a corresponding
signal to the PCM. From this signal, the PCM will modify the air/fuel
ratio (mixture), idle speed, spark advance, EGR and canister purge
control. When the engine coolant is cold, the ECT sensor signal causes
the PCM to provide enrichment to the air/fuel ratio for good cold
drive-away; as engine coolant warms up, the voltage will drop.
Engine component locations-1994 5.8L engines
I hope help you with this, good luck (remember rated this help).
It will be on the drivers side on the front of the head
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