EGR System
- Using a 3-way connector, connect a vacuum gauge to EGR vacuum hose. Start engine and run at idle speed. See Fig 1.
- With coolant temperature below 86°F (30°C), vacuum gauge should indicate 0 at 2000 RPM. When engine is warm, low vacuum should be present.
- Disconnect vacuum hoses from pipe E and F of VSV. Run engine at idle speed. Blow air into pipe F checking that VSV closes.
- Increase engine speed to above 1700 RPM. Blow air into pipe F checking that VSV opens. Reconnect vacuum hoses.
- If system operates as described, it is functioning correctly. If not, test individual components and repair or replace as necessary.
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