| Testing the intake system for tightness (unmetered air) |
| For engine with identification characters BME |
| Special tools and workshop equipment required |
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| Vehicle diagnosis, measurement and information system -VAS 5051B- |
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| Engine leak search spray -G 001 800 A1- |
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| Coolant temperature minimum 80°C |
Note | t
| Because of the vacuum in the intake system the leak search spray is sucked in with the unmetered air. The leak search spray reduces the ignition performance of the mixture. This results in a drop in engine speed and a change in the lambda control value. |
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| You must comply with the safety instructions on the box. |
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| Connect vehicle diagnosis, measurement and information system -VAS 5052-. Run engine at idling speed. |
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| Observe and take down engine speed and lambda control before catalyst. |
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| Systematically spray parts of the intake system with engine leak search spray. |
| If the engine speed drops or if the lambda control changes: |
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| Check the sprayed part of the intake system for leakage and eliminate leak. |
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