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Home >> Isuzu >> 1988 >> Trooper II S, 4D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Component Testing >> Vacuum Switching Valve >> Impulse Turbo
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Impulse Turbo

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

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