Low At Idle In All Ranges
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2003 Mazda B4000, 2003 Mazda B3000, 2003 Mazda B2300, 2002 Mazda B4000, and 2002 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
Low fluid level, faulty intake screen/filter or filter seal, loose valve body bolts, pump or pump gasket leakage, case leakage, or faulty valve body or separator plate.