K04-001 crazy boost??!!

[Marc87]

Been having problems with my k04-001 mk4 golf with it going into limp mode every so often and fitted a boost gauge yesterday which is showing that its spiking at 29psi then tailing off to 22psi as the revs get higher. I assume this cant be right??

The car was mapped by rtech about 18 months ago and im trying to get it back to them to get it looked at but my clutch is starting to slip now.

Can anyone offer any advice???

[Marc87]

Also did some data logging about 2 weeks ago which was showing 22psi of boost but i dont know if vcds shows the spike in boost or what it was holding??

[JimBR]

Over boosting? Faulty N75..

[Marc87]

Yeh i was thinking that but im not getting an n75 fault come up vcds but i suppose it doesnt meant its not the problem. Do you know how much an n75 would be from vw??

[Wazzzer]

N75 is about £60