Air Injection: Testing and Inspection

Air Injection System:

Note: Aspirator valve not repairable. If valve is faulty or defective it must be replaced with a new valve.

ASPIRATOR VALVE OPERATION TEST

Note: Aspirator valve failure indicated by excessive exhaust noise under hood at idle, and hardening of rubber hose from valve to air cleaner.

1. Check aspirator tube catalyst assembly joint and hose connections at aspirator valve and air cleaner for leakage.
^ If aspirator tube catalyst joint is leaking, tighten to 40 lb-ft (54 Nm).
^ If either hose connection is leaking and the rubber hose has not hardened, install suitable hose clamps.
2. Disconnect hose from aspirator valve inlet.
3. With the engine idling and the transmission in neutral, check for vacuum exhaust pulses at the aspirator valve inlet.
^ If no pulses are felt or if hot exhaust gas is escaping from the aspirator inlet, replace aspirator valve.