Sorry new on here but ive searched and cant find it, my golf just started running funny on the way home from work, on boost (just above 1800, window open) the turbo sounds like its fluttering, like the sound a sprinkler makes and when i let off, it made a wastegate noise like a performance jap car! There is a noticable amount of black smoke too, so i put my foot down to see if it would clear but it seemed to make it worse? once you go past the initial boost there is a knocking sound from the engine area. so I limped home and opened the bonnet, there is oil around the EGR valve and around the filler cap. i removed the cap and there was a slight (only tiny) amount of pressure, and a puff of smoke from the out the cap, i left the cap off and there was still a little bit of smoke coming out. not burning smoke more like steam? theres no management lights or anything so whats up??

Just to sum up:
- Turbo fluttering
- Oil coming from EGR and top of Filler cap
- Stuttering power on boost, knocking noise like overfuelling at higher revs
- Totally fine if driven slow

I think it sounds like an EGR fault or an overboosting fault??
any other ideas please!!
Thanks Guys!

EDIT: Forgot to say its a GT TDi 130 PD 2002 with 96k miles!