Civic CVCC L4-1488cc 1500 EM1 (1982)
Purge Control Diaphragm Valve: Testing and Inspection
Cold Engine
NOTE: Engine coolant temperature must be below thermovalve "B" set temperature.
Fig.45 - Purge Control Diaphragm Valve Check
1. Disconnect upper hose at purge control diaphragm valve and connect vacuum gauge to hose, Fig. 45.
2. Start engine and allow it to idle. If there is vacuum, check thermovalve "B". If not, disconnect vacuum gauge and reconnect hose.
Hot Engine
1. Disconnect upper hose at purge control diaphragm valve and connect vacuum gauge to hose, Fig. 45, then wait for engine to reach operating
temperature.