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Home >> Isuzu >> 1987 >> Impulse Base, Standard, MSG4K >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Component Testing >> Vacuum Switching Valve >> Impulse
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Vacuum Switching Valve: Impulse

Apply 12 volts to vacuum switching valve. Ensure air flows freely through valve. Remove voltage and ensure air does not flow through valve. If air flows through valve after removing voltage, replace valve.