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EGR Control Valve

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1989 Mazda MX-6, 1989 Mazda MPV, 1989 Mazda B2600i, 1989 Mazda B2200, and 1989 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

Bring engine to normal operating temperature and run at idle. Disconnect and plug vacuum hose at EGR control valve. Engine should run smoothly. Connect vacuum pump to EGR control valve and apply more than 2.36 in. Hg. Engine should run rough or stop. If procedure fails, clean or replace EGR control valve.

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