System Check (Millenia)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Check all connectors and vacuum hose routing. Check for cracks, leakage and restrictions, and repair as necessary. Connect vacuum pump to EGR valve fitting. Start engine and let idle. Apply 3.55-4.33 in. Hg to valve. Ensure engine idles rough or stalls. If engine does not operate as specified, replace EGR valve.