Pickup 2WD V6-3137cc 3.1L (CPC) (1991)
Thermostatic Air Cleaner Vacuum Motor: Testing and Inspection
THERMAC Operation
-
With engine "OFF," disconnect vacuum motor hose.
-
With a hand pump, apply 23 kPa (7 in.Hg) vacuum to motor. Valve door should completely block off outside air when vacuum is applied. If
not, check that linkage is correctly installed and not binding.
-
Check that vacuum motor diaphragm holds vacuum and does not leak down.
-
Correct any linkage problems and if diaphragm leaks, replace vacuum motor.