ENGINE MAINTENANCE

MA-19prose procedure

Checking Positive Crankcase Ventilation (P.C.V.) System

CHECKING P.C.V. VALVE

With engine running at idle, remove ventilation hose from P.C.V. valve; if valve is working properly, a hissing noise will be heard as air passes through it and a strong vacuum should be felt immediately when a finger is placed over valve inlet.

Checking Vacuum Hoses and Connections

Check vacuum hoses for improper attachment and for leaks, cracks, damage, loose connections, chafing and deterioration.

Checking Vapor Lines

1
Visually inspect vapor lines for improper attachment and for cracks, damage, loose connections, chafing and deterioration.
SMA997B
2
Inspect vacuum relief valve of fuel tank filler cap for clogging, sticking, etc. Refer to "EVAPORATIVE EMISSION CONTROL SYSTEM" in EF & EC section.

Component LocationFig. fig2

Engine bay showing evaporative emission control components

Engine bay photograph showing canister and vapor line locations

SMA997B

1Canister(center of figure)

2Vapor line(lower left of figure)

Cross References