1. Start and warm up the engine. |
2. Close the valve a finger. If vacuum is absent, check whether the hose, an opening in an inlet collector or the valve is littered. |
3. Kill the engine. |
4. Disconnect the valve from a shlag and blow through the valve from that party by which it ustvnavlivatsya in a head of cylinders. Check that air passed through the valve. |
5. If air does not pass in this direction, replace the valve. |
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