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Home >> Isuzu >> 1986 >> Trooper II LS, 2.2 U >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing - Gasoline >> Component Testing >> Thermal Vacuum Valve
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Thermal Vacuum Valve

Remove thermal vacuum valve from engine and place sensing portion in water. Water should be at 115-129°F (46-54°C) for automatic transmission equipped vehicles or 113-131°F (45-55°C) for manual transmission equipped vehicles. Blow through hoses connected to valve. Air should pass, indicating valve is open. If not, replace valve.

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