Originally Posted by excessive

Engine is 4.0 tdi. It is been a month since I've started experiencing this. It happens 99% of the times the car is started, no matter if its hot or cold, if it's been running for long or not. I just start the car, and there's little response in P. Up to ~1200 rpm, but if I shift to D it's even worse since there is no response at all, and I have to wait a few seconds and then suddenly the throttle will "comeback". No matter if I pump the pedal or just push it WOT it is the same for 5 to 15 seconds. Afterwards it will be fine until I stop and turn it off. Diagnostic shows P0102 Mass Air Flow (MAF) Circuit Low error. I've bought two MAF's one used from same car and one brand new (PIERBURG). I've tested all possible combinations of using them (since the car has two MAFs, one for each turbo), with or without MAFs the error is same and the car keeps its behaviour. I have also changed oil + filter and fuel filter.