I have a VW Bora PD130 sport (160,000 miles).

I have a VW Bora PD130 sport (160,000 miles), all was fine for a month, fixed the turbo inlet pipe, with new clips, then decided on a full service(oil, oil filter, fuel filter, air filter, cam belt), everything was fine until under hard acceleration (on a slip road) in 3rd, limp mode would cut in n not accelerate past 80(eventually after downshifting a few times upto 100), turning the ignition on n off worked for a few weeks, but now doesnt). The light would go out once back around the streets but still 'limp' a little, the turbo only kicks in at 4000 revs in second n wont go past 3500 before limping, ive noticed if you keep the turbo spooling it keeps boosting but if you give a second, boost goes-ive had 17964 fault code, changing the boost pressure sensor(bosch) made no difference, the airflow sensor made no differance either-on the other hand intermittently-performance comes and goes, even beating a mates pd130 mkiv golf from 90-120, so I think its summat small. No1 knows wat its is and vw dont help, they just say 'new turbo'-which isnt the case, I didnt realise I had Parking sensors till 3 months into ownership-which is intermittent and also a feint engine note through the stereo every so often-theres no exhaust smoke(no more than there should be)mpgs are 56 at 70(Mway) and around 40 combined MPG.
I think thats it lol