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Cayenne S runs strangely after replacing the water pump

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Hello Forum, this is my first thread. I kindly appreciate the vast amount of information found in here.

Yesterday i have - based on a tutorial in this forum - replaced the water pump. This means i removed the air intake pipes, losened the belt, unscrewed the old waterpump, reinstalled a new gasket plus the waterpump and reassembled back together.

I did not reinstall the metal clamps sitting on the large black intake hoses in the front because i wanted to "test" before i reassemble all the things back.

However, the engine runs very turbulent. The idle speed of the engine variies strongly and eventually it stalles / dies.

May it probably have something together with the leaking coolant pipes, which are still yet to be fixed?

Any idea what i could have done wrong or any suggestions to a good fix?

Thanks folks,


Edited by IchBinEineNudel
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I had a similar event when replaced my water pump on my turbo. I would suggest using a diagnostic tool such as durametric and clear any error codes. The EMU recongizes when any sensors have been disconnected and records then as an errors. By clearing the error codes should resolve the problem.


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