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Home >> Oldsmobile >> 1997 >> Cutlass Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine System Testing & Engine Component Testing - 3.1L >> Emission Systems & Sub-Systems >> Air Injection >> Check Valve

Check Valve

Detach check valve and blow through valve in direction of check valve flow (to cylinder head). Attempt to suck air back. Replace valve if airflow is allowed against the direction of flow.

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