Test Notes

Typical PCV System Air Flow:

Enter this pinpoint test only when directed here.

This pinpoint test is intended to diagnose the following:
- Positive Crankcase Ventilation (PCV) valve and related vacuum lines.





1. Visually inspect the components of the PCV system.
2. Check the fresh air inlet hose and the PCV hose for air leakage or flow restriction due to loose engagement, kinking, nipple damage, rubber grommet fit, elasticity, or any other damage.
3. Check engine for rough idle, slow starting, or high oil consumption.
4. If a component is suspected as the obvious cause of a malfunction, correct the cause before proceeding to the next step.
5. If all checks are OK, proceed to pinpoint test step HG1.