Ford Workshop Service and Repair Manuals > F 150 2WD Pickup V8-351 5.8L (1986) > Powertrain Management | Emission Control Systems | Inlet Air Temperature Control <--> [Thermostatic Air Cleaner] | Thermostatic Air Cleaner Vacuum Switch | Component Information | Testing and Inspection

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Thermostatic Air Cleaner Vacuum Switch: Testing and Inspection
Air Cleaner Cold Weather Modulator

A 54 kPa (16 inches Hg) vacuum applied to motor side of the modulator holds or leaks as follows:

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