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.

Ported EGR Valve

Warm engine to operating temperature. Increase engine speed to 1900 RPM on non-turbo engines or 2600 RPM on turbo engines. EGR valve should open. Disconnect vacuum hose (upper hose on EGR valve with 2 hoses) from EGR valve. Apply vacuum. Engine should idle rough or idle speed should drop.