Originally Posted by vroooom ptssssh
bin the chump valve for kick off
now, the problem. .
could be a few things, i'd immagine a boost hose is colapsing under load if the car runs fine otherwise.
Daz, if it ran 0psi boost, it would still go past 90mph suerly?
Maybe, maybe not. But as he suspects it may be a boost problem, it could be beneficial to check it is at least rnning standard boost.