Vacuum Chamber (Protege 1.8L)
WARNING: This page is about a different car, the 1995 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
Remove vacuum chamber. Visually inspect vacuum chamber for clogging, cracks and damage. Blow air through port "A" and ensure air DOES NOT flow through port "B". See Fig 1 . Blow through port "B". Ensure air flows through port "A". Replace as necessary.