Commander 4WD V8-4.7L VIN N (2006)
13. If vacuum is not present, disconnect each PCV system hose at top of each crankcase breather (1). Check for obstructions or restrictions.
14. If vacuum is still not present, remove each PCV system crankcase breather's (1) from each cylinder head. Check for obstructions or restrictions. If
plugged, replace breather. Tighten breather to 12 N-m (106 in. lbs.) torque. Do not attempt to clean breather.
15. If vacuum is still not present, disconnect each PCV system hose (1) at each fitting, and at each check valve (2). Check for obstructions or
restrictions.
