Operation CHARM: Car repair manuals for everyone.

PCV 2 - PCV System Check

^ START engine and bring to normal operating temperature.

^ Disconnect hose from remote air cleaner or air outlet tube (tube connecting mass air meter and throttle body).

^ Place a stiff piece of paper over the hose end. Wait one minute.

^ Does vacuum hold the paper in place?

YES -- System is OK. Reconnect hose. Go to diagnostic routines for other possible causes of vehicle symptoms. SEE Powertrain Management / Testing and Inspection / Diagnostic Routines.

NO -- System is plugged or evaporative emission valve is leaking (if equipped). Go to PCV3. PCV 3 - Evaporative Emission System Check