Results of incorrect operation
Clogged openings or hoses in the crankcase forced ventilation system (PVC) can lead to the following circumstances:
- Rough idle
- Engine stalling or low idle speed
- Oil leaks
- Oil in the air filter
- Sludge in the engine
A leaking hole or hose in the PVC system can cause the following conditions:
- Rough idle
- Engine stop
- High idle speed
Functional check
These systems may experience: excess gas leakage compared to the system capacity due to significant engine wear, as well as prolonged heavy load, etc. In this case, gases are emitted into the air filter and then sucked into the engine.
The proper operation of the PCV system depends on the quality of the engine seal. If deterioration of the oil flow conditions or its dilution is noticed, but the PCV system is working properly, check the engine to determine the possible cause. Eliminate all problems.
If the engine idles erratically, check to see if the PVS system opening is clogged, the ventilation filter, air filter and hose are clogged. Replace if necessary. Perform the following procedures:
- Disconnect the positive crankcase ventilation hose from the cylinder head cover.
- Let the engine idle.
- Place your thumb over the end of the vent hose to check for vacuum. If vacuum is not created in the vent hose, check the following items:
- Clogged hoses
- Collector hole
- Turn off the engine.
- Carefully inspect the PCV hole in the cylinder head cover for metal shavings or blockages.