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Home >> Isuzu >> 1985 >> I-Mark 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing - Gasoline >> Component Testing >> Vacuum Switching Valve >> Impulse (Turbo Only)

Impulse (Turbo Only)

Ensure that engine is cold and that idle and WOT switches are off. Disconnect hoses from opposite side of valve. Blow through hoses connected to valve. Check that no continuity exists between hoses when engine is cold and that valve opens when engine is warm, over 122°F (50°C).