B250 3/4 Ton Van V8-360 5.9L VIN T 4-bbl (1982)
Pulsed Secondary Air Injection: Testing and Inspection
NOTE: The aspirator valve is not repairable and if necessary, should be replace with a new valve. Aspirator valve failure results in excessive exhaust
system noise under the hood at idle and hardening of the rubber hose from the valve to the air cleaner.
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If there is excessive exhaust noise from under the hood, first check the aspirator tube exhaust manifold assembly joint and hose connections at the
aspirator valve and air cleaner for leakage.
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If the aspirator tube exhaust manifold assembly joint is leaking, remove aspirator tube assembly and replace the gasket.
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If either hose connection is leaking and the rubber hose has not hardened, install suitable hose clamps.
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To determine if the aspirator valve is inoperative, disconnect hose from aspirator valve inlet. With the engine idling and the transmission in
neutral, the vacuum exhaust pulses can be felt at the aspirator valve inlet, if hot exhaust gas is escaping from the aspirator inlet, the aspirator valve
is inoperative and must be replaced.
