Freshly rebuilt rb26 with power issues, sometimes it's a animal next Time I put my foot down the car runs like there is a boost leak, turbo is labouring but no power, car is doey and pops a lot when it goes into nugget mode, Ive changed tps, cams, fuel system, turbo, intercooler, computer, exhaust manifold, exhaust system, radiator, engine, cam gears. I've noticed sometime the car is turned on blows some smoke not sure why. Any help would be appeciated as I have 500kw gtr that can run properly for one year