I have a 2011 landrover l4 with the V8, I'm having a problem with rough idle only when cold, after the engine is warmed up it goes away. Runs just fine when hot and with no roughness. Search the Internet for similar problems and everything points to a vanos solenoid valve that may be dirty or not working. Is there such a thing on the 2011 L4? It has 140 miles, and I just changed the plugs, everything looked normal, and the plugs looked normal for 140k miles and it did not make any change in the symptoms. Not getting any engine codes, and problem seems to go away after the engine is warm. Any help you can provide would be appreciated? Thanks, tom

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