Air Aspiration System

The aspirator valve is not repairable, and, if it malfunctions, a new valve should be installed. Valve failure will be indicated by excessive exhaust system noise in the engine compartment at idle and hardening of the rubber hose from the valve to the air cleaner. If there is excessive exhaust noise underhood, check the aspirator tube/manifold assembly joint and hose connections at the aspirator valve and air cleaner for leakage. If there is leakage at the joint, remove the aspirator tube assembly and replace the gasket. If either hose connection is leaking, but the hose has not hardened, install hose clamps.
To determine if valve has failed, disconnect hose from aspirator inlet. With engine idling in neutral, the negative (vacuum) exhaust pulses can be felt at the aspirator inlet. If exhaust gases are escaping from the aspirator inlet, the valve should be replaced.