EL Camino V6-229 3.8L (1982)
Thermal Vacuum Valve - EVAP: Testing and Inspection
Below the switching point;
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Ports 1 and 2 should be blocked
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No ported vacuum should be directed to the canister and EGR valve.
Above the switching point;
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Ports 1 and 2 should be open, allowing ported vacuum to be directed to the canister and EGR valve. Replace valve, if defective.
NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.
