I'm running a 2006 Jetta TDI 5spd with an EGR delete and dynamic idle tune. Its been giving me some trouble lately. It used to have a seemingly infamous surge (spike) in power at approx. 1,800 rpm with good power all the way up to red line... fun to drive. Now it doesn't surge anymore however the power is gone too. I can get it up to highway speed but that about it. Engine light is on and constantly going into what seems to be limp mode (no power, no speed control). I just took it into the local dealer to run some scans. Came back with three malfunctions detected: P0234, P0113, P0238 and some measured values in display group 4 and 43 which I have no clue what they mean. I'm told I need a new turbo! Report shows engine oil was low, probably because the turbo is syphoning from the crank case. The turbo isn't operating properly... boost starting at 45% going to 100% Is there anything else to look into before diving into a turbo replacement? $$$$ Another issue is that it starts and runs poorly when its cold. Hard starts and rough idle with lots of smoke (grey/white). Does this tie in with the other problem or is it something all on its own?