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POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM (FOR 2.3L 13.OL I4.OL)
1
POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
(FOR 2.3L 1 3.OL 14.OL)
DESCRIPTION
The PCV valve is operated by the intake manifold vacuum. When the engine is running at idle, the PCV
valve is slightly open and a small amount of blowby gas is drawn into the upper intake manifold to be
reburned. As the engine speed rises, the PCV valve is opened further, allowing a larger amount of blowby
gas to be drawn into the upper intake manifold.
I
TO EVAPORATIVE EMISSION CANISTER
EE%
TO THR0TIl-E BODY
PCV VALVE (FOR 2.3L / 4.OL)
Inspection
Note
Perform this inspection while the engin is cold.
1. Run the engine at idle.
2.
Disconnect the PCV valve along with the ventilation hose
from the cylinder head cover.
3. Block the PCV valve opening.
4. Verify that vacuum is felt.
5. Remove the PCV valve.
6. Blow through the valve from port h and verify that air
comes out of port B.
7. Blow through the valve from port B and verify that no air
comes out of port A.
8. Shake PCV. PCV should rattle.
9. Replace the PCV valve if not as specified.
PCV VALVE (FOR 3.OL)
lnspection
1. Remove the PCV valve from the valve cover.
2. Shake the PCV valve.
3. Verify that the PCV valve rattles when shaken.
4. If the PCV valve does not rattle (sticking), then replace
it.
5. Reinstall the PCV valve and hoses.
6. Warm the engine at idle.
7. Disconnect the hose from the PCV valve leading to the
throttle body.
8. Block the hose opening.
9. Verify that vacuum is felt.
10. If
no vacuum is felt, check for restrictions and replace the
hose if restricted or leaking.
11. Inspect the evaporative emission hose between the
PCV valve and the evaporative erriission canister, and
replace it if it is leaking.
6BUOFT-214
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Troubleshooting
