1. Start and warm up the engine. |
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2. Remove the valve from a cover of the klapanny mechanism. Close the valve a finger. If depression is absent, check, whether the hose, an opening in an inlet collector or the valve is littered. |
3. Muffle the engine. Shake the valve. You should hear knock of a plunzher in the valve. If is not present, replace the valve. |
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