October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

All Models (Ported EGR Valve)

Disconnect vacuum hose from EGR valve. Run engine to normal operating temperature. Attach a vacuum pump to EGR valve. With engine idling, apply 8 in. Hg to EGR valve. If vacuum holds and idle becomes unstable or engine stalls, EGR valve is functioning properly. Reconnect vacuum hoses. Increase engine speed to 3000-3500 RPM. Ensure EGR valve opens.