Chevrolet Sonic Repair Manual: Crankcase Ventilation System Inspection/Diagnosis
- Results of Incorrect Operation
-
A plugged positive crankcase ventilation (PCV) orifice or hose may cause the following conditions:
- Rough idle
- Stalling or slow idle speed
- Oil leaks
- Oil in the throttle body
- Sludge in the engine
- Functional Check
-
With these systems, any blow-by in excess of the system capacity, from a badly worn engine, sustained heavy load, etc., is exhausted into the throttle body and is drawn into the engine.
Proper operation of the crankcase ventilation system depends upon a sealed engine. If oil slugging or dilution is noted and the crankcase ventilation system is functioning properly, check the engine for a possible cause. Correct any problems.
If an engine is idling rough, inspect for a clogged PCV orifice, a dirty vent filter, air cleaner element, or plugged hose. Replace as required. Use the following procedure:
- Remove the PCV hose from the cylinder head cover.
- Operate the engine at idle.
- Place your thumb over the end of the hose in order to check for a vacuum. If there is no vacuum at the hose, inspect for the following items:
- Plugged hoses
- The manifold port
- Turn OFF the engine.
- Inspect the PCV orifice in the cylinder head cover for debris or blockage.
PCV
...
Positive Crankcase Ventilation Hose/Pipe/Tube Replacement
Removal Procedure
Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct
Replacement.
Open the 2 positive crankcase ventilation pipe retainer clips ...
Other materials:
Passenger Sensing System
United States
Canada
The passenger sensing system turns off the front outboard passenger frontal airbag
and knee airbag (if equipped) under certain conditions. No other airbag is affected
by the passenger sensing system. See Passenger Sensing System for important
information.
The ...
Windshield Outside Moisture Sensor Cover Replacement
Windshield Outside Moisture Sensor Cover Replacement
Callout
Component Name
1
Windshield Outside Moisture Sensor Cover
Procedure
Grasp the cover in the center and gently slide to the right.
...
System temporarily unavailable
While operating the Nissan Armada, certain road environments such as winding
mountain routes, steep inclines, sharp curves, narrow lanes, or areas under construction
can temporarily affect the performance of the driver assistance systems. In these
situations, the sensors may incorrectly id ...
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