Hi Everyone, need help with an issue: Have a 2011 Golf with 2.5l auto, sportline. When it's cold (around 0 degrees Celsius - freezing temp.)the car starts but only goes up to around 800rpm then stutters pretty bad as if it's missing, sometimes it will stall and sometimes it won't. Doesn't do it if it's above freezing (around) or if it has been running within the last few hours. So far my mechanic has cleaned the throttle body and checked for vacuum leaks, no codes have been generated and my mechanic says that everything looks fine on the computer (all values look right and no error codes). I've also changed the upper (on the block) coolant temperature sensor with no luck. I'll be changing the lower temp sensor in a day or two. Anyone have any ideas? N80 valve? Fuel filter? Thing is it only happens when it's cold.