Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Positive Crankcase Ventilation: Testing and Inspection

1. Start engine and idle.

2. Remove hose from PCV valve and check for vacuum.
If strong vacuum exists proceed to step #4.
If not proceed to step #3.
3. Remove PCV valve and shake to check if it is sticking.
If OK proceed to step #4.
If not OK, replace valve.

Fig. 159 PCV Hose Test:

4. Check all hoses for restrictions.
Clean or replace hoses as necessary.