Aspirator Air System: Testing
Aspirator valve is not repairable. If valve fails, it must be replaced. Check all connections for proper assembly. If leakage is noted at any joints, repair before testing valve.
To test aspirator valve, disconnect hose from aspirator inlet. With engine idling in Neutral, vacuum exhaust pulses should be felt at aspirator inlet. If hot exhaust gas is escaping from inlet, valve is defective and must be replaced. If aspirator hose is hard, hose must be replaced.