hi guys i have a r33 s1 skyline with 145,000ks on the clock no leaks/problems at all,the car is great on fuel $75 to fill and i get 550ks out of a take easy and it doesnt smell fuelly only a bit wen its cold drives good at cruising speed in any gear but if u put ur foot down its like the car starts to go then u can feel it holding back not julting but just a constant hold back in boost???it seems to start around 3k revs and goes right though the rev range i have checked all vacuum hoses and fitted all hose new clamps it has a r34 side mount intercooler and the standard boost controller disconnected and a turbo smart boost tee fitted running 7psi boost.it has a 3.5" super cat exhaust with highflow cat.i have had the car for 4 months and the car was fine wen i bought it.to try and fix the problem i have also changed the afm,replaced the fuel pump with a standard 2nd hand fuel pump,iridium spark plugs gapped at 0.8mm r33 gtr coil packs.with these things changed there has been no improvement.if i hold my foot flat to the floor it just starts goin then the turbo keeps boosting but it just take ages for it to climb up the rev range and if i keep my foot down and punch it through the gears wen u back off the gas at anytime it backfires and caries on and sometimes at idle it it runs realy rough then if u give it a rev it sometimes fixes it but other times it does it for a while even after driving it for a bit .any suggestions on wat it could be or a ruff guess on a price for someone to have a look.im located at wyong on the central coast so if u have any suggestioins of mechanics/tuners that could help me out that would be great,cheers