Vacuum Hoses & Connections Test

WARNING: This page is about a different car, the 2000 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.

Check following components for leaks to atmosphere and repair or replace as necessary:

Fuel tank leak.
Faulty fuel filler cap.
Fuel fill pipe.
On-board Refueling Vapor Recovery (ORVR) Vent Shut Valve (VSV) malfunction.
ORVR vapor recirculation valve malfunction.
ORVR vapor recirculation tube malfunction.
ORVR signal tube malfunction.
ORVR vapor vent tube malfunction.
EVAP 2-way valve malfunction.
Fuel tank pressure sensor malfunction.

If above components are okay, perform On-board Refueling Vapor Recovery (ORVR) Vent Shut Valve (VSV) test and substitute a known-good PCM and recheck. See ON-BOARD REFUELING VAPOR RECOVERY (ORVR) VENT SHUT VALVE (VSV) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. See SUBSTITUTING PCM under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or problem goes away, replace original PCM.