Boost issues 1.9tdi

[tara_nta]

Hi, i have an A4 tdi on a T reg (engine code AFN)

Say for example im joining a bypass / motorway and building up my speed, foot to the floor through 3rd and 4th gear, by the time im halfway through 4th the boost just cuts off completly, totally flat, no turbo........however if i flick the ignition off then on it boosts fine again.
Its seems to be when i load it up in the higher gears, 1st 2nd and 3rd are usually ok.

Thanks in advance for any input

 

[adamss24]

Turbo needs a clean tothe VNT mechanism...

 

[ruffrida]

Sticky turbo vaines or boost leak, but sounds more like sticky turbo, do a search on the 8L page or look on my started posts, been through all this with my 8L

 

[shaz8389]

http://www.audi-sport.net/vb/a4-s4-forum-b5-chassis/107121-un-sticking-your-tdi-vnt-turbo-vanes.html

Just need to figure out the right Mr Muscle to buy!