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.

Piston Engines (Exc. GLC)

With engine idling at normal operating temperature, disconnect PCV valve hose at valve cover. Close off hose opening with finger and check that idle speed drops. If idle speed does not drop, replace PCV valve.