Canister Purge Control Valve: Testing and Inspection

1. Check for fuel vapor leakage in the distributor vacuum line at diaphragm of carbon canister purge control valve.
a. Disconnect rubber hose in line between ``T'' connector and carbon canister ``T'' connector.
b. Inhale air into opening of rubber hose running to vacuum hole in carbon canister and ensure that there is no leak.
2. If there is a leak, remove top cover of purge control valve and check for dislocated or cracked diaphragm. If necessary, replace diaphragm assembly which consists of a retainer, diaphragm, and spring.