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jlukas
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Everything posted by jlukas
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New member here, I recently bought a 2008 Cayenne S and had the same issue. There are 2 separate pumps. They are contained in the washer fluid reservoir behind the passenger side wheel well liner. It is a very simple job to remove the wheelwell liner, the plastic cladding in engine bay and a couple of bolts and lines then replace the washer fluid pump. Pump parts are cheap and is a very easy DIY to fix this problem.
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New member here, I had been lurking before and this thread helped me diagnose and completely cure similar issues on my 2008 Cayenne S with 133,000 miles at the time. It is not a difficult DIY, the key to it all is to remove airboxes and both fender liners, get stubby ratchets to fit in the tight space on the passenger side and use a motor support (I bought mine from Amazon for $89). You do need to loosen the front subframe for room to drop out the old mounts. There are a couple of good write-ups on this on this site I believe and perhaps Rennlist.. Just Google Porsche Cayenne Motor Mount Replacement and you will find them with pictures. I had the exact same symptoms, idle stumbles and vibrations as described throughout this thread and the combination of motor mount replacement and engine torque damper replacement cured them all. It is about a 1 day DIY although I would recommend doing it indoors rather than attempting it in a driveway although I am sure that is possible. A good 1/2" impact would be advisable for the subframe bolts unless you are pretty **** strong! Total cost is about $250-300 depending upon where you source your mounts. Lemforder mounts can be had at a good price on Rockauto.com although there are many other affordable sources with Sunset Porsche cheapest for OEM parts.
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My Cayenne S had very similar issues prior to my purchase. The solution (from iAutohausAZ) was replacement of the High Pressure Fuel Pump. You might try that or suggest it to your service tech.