THERMO Valve & Purge Control Valve
- Ensure vacuum lines are properly routed and are not damaged or obstructed. With engine coolant temperature below a designated thermosensor operating temperature, disconnect upper vacuum hose from purge control valve. Refer to THERMO SENSOR OPERATING TEMPERATURE table for specific temperature.
- Connect vacuum gauge to hose. Start engine and let idle. Vacuum should not be present. If there is vacuum replace thermo valve. Retest thermo valve.THERMO SENSOR OPERATING TEMPERATURE
Application Operating Temperature °F (°C) 825 131 (55) - If there is no vacuum, remove vacuum gauge and reconnect hose. With engine coolant temperature above specified temperature, disconnect upper vacuum hose from purge control valve. Run engine at idle and observe vacuum gauge.
- If there is no vacuum replace thermo valve and retest.