and Diagonistics:
VALVE CHECK
NOTE:
Set parking brake and block wheels. Place transmission/transaxle in NEUTRAL or PARK. Place the A/C-Heat selector in the OFF position.
l Remove PCV valve from rocker cover grommet (for 5.0L cars, the PCV valve is located on top of block by firewall).
l Shake the PCV valve.
l Does PCV valve rattle when shaken?
Yes
REINSTALL PCV valve. GO to «PCV2».
No
PCV valve is sticking.
REPLACE PCV valve.
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PCV SYSTEM CHECK
l 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 «Section 2A» for other possible causes of vehicle symptoms.
No
System is plugged or Evaporative Emission Valve is leaking (if equipped). GO
to «PCV3».
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PCV3 EVAPORATIVE EMISSION SYSTEM CHECK
l Disconnect evaporative hose (if equipped), cap the connector and retest.
l Place a stiff piece of paper over the hose/nipple, as in PCV2. Wait one minute.
l Does vacuum hold the paper in place?
Yes
GO to Evaporative Emission System, «Section 11A».
No
CHECK for vacuum leaks/obstruction in the system: oil cap, PCV valve, hoses, cut grommets (oil separator on 2.3L HSC, 2.9L and 4.9L engines) and rocker cover for bolt torque/gasket leak. SERVICE as necessary.