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Home >> Isuzu >> 1985 >> I-Mark 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing - Gasoline >> Component Testing >> Thermal Vacuum Valve >> Impulse
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Thermal Vacuum Valve: Impulse

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 122°F (50°C).