Checking Positive Crankcase Ventilation (P.C.V.) System / Checking Vacuum Hoses and Connections / Checking Vapor Lines
MA-36prose procedureVentilation hose routing differs between SR20DE and SR20DET engines.
ENGINE MAINTENANCE
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 VENTILATION HOSES
- 1Check hoses and hose connections for leaks.
SMA439A - 2Disconnect all hoses and clean with compressed air. If any hose cannot be freed of obstructions, replace.
Checking Vacuum Hoses and Connections
Check vacuum hoses for improper attachment and for leaks, cracks, damage, loose connections, chafing and deterioration. Refer to Vacuum Hose Drawing in ENGINE AND EMISSION CONTROL OVERALL SYSTEM in EF & EC section.
Checking Vapor Lines
- 1Visually inspect vapor lines for improper attachment and for cracks, damage, loose connections, chafing and deterioration.
SEF779K - 2Inspect vacuum relief valve of fuel tank filler cap for clogging, sticking, etc. Refer to EVAPORATIVE EMISSION CONTROL SYSTEM INSPECTION in EF & EC section.