Now it looses power badly at about 2500 rpm and will not rev over 3000 rpm in 4th gear. Up to 2500 it runs fine and feels good, but when it hits 2500 its like taking your foot of the throttle. There is no decernable smoke from the exhaust, but fuel econanmy seems to have dropped off. There is also a noise from the turbo (i think), that sound a bit like a blow off valve the local hoons fit to there skylines etc. I pulled the turbo hoses and the impellers spin free with no 'slop'. I checked boost (not under load) - 10 psi.
Any sugestions would be greatly appreciated.
