Vacuum Line Inspection (MILLENIA S)

Remove the clamps and the hose. Apply both suction and pressure to the engine-side of the hose, and verify that air flows only toward that side. See Fig 1 . If air flows in both directions or not at all, replace the vacuum hose. When installing hose, ensure arrow is pointing in the right direction.

Fig 1: Checking Vacuum Hose Flow

Courtesy of FORD MOTOR CO.