Hi all, I have a audi a6 1.9tdi 130bhp se avant. I've owned it for over a year now and tried heaps of things to rectify why the turbo doesn't work all of the time.All the vaccuum pipes have been checked by audi garage,it has a new maf fitted, the fuel filter is new, the egr valve was temporary blanked off, and the last was a remap .....still running at 130bhp. What i have noticed is when the car performs really well so too do the brakes the brakes seem to work sooner at the touch of the pedal and with more stopping power.Now they are connected via the vaccuum pump somehow.All other times the brakes feel spongy.Anyone else had this or similar? cheers