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Home >> Isuzu >> 1989 >> Impulse 2.0 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - EFI >> Emission Systems >> Air Injection >> Check Valve

Check Valve

  1. Remove check valve from intake manifold. Blow air into air pump side of check valve. Check that air flows freely to manifold side of valve.
  2. Blow air into manifold side of check valve. Check that air does not pass to air pump side of valve. If check valve does not function as described, replace check valve.
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