Purge Solenoid

1988-89
The purge solenoid is energized by the SMEC when engine temperature is below 70 °F or is above 70 °F for less than 7 seconds. This closes the solenoid and prevents manifold vacuum or pressure from reaching the charcoal canister valve. When predetermined time and engine temperature are reached, the solenoid is de-energized and vacuum will flow to the canister purge valve and purge vapors through the throttle body.

When in boost, the solenoid is energized which prevents canister purge operation.