hi all 180 bhp auq having a fit surging boost 2-3 psi up and down when over 3700rpm and noticable in 3rd gear mostly fitted new maf , cupra r pump, injector seals, iat sensor, lambda, inlet manifold gaskets , exhaust manifold and turbo gaskets, y breather pipe, s pipe under inlet , pcv and pcv pipe, hard pipe to breather, silicon boost kit, silicone cooler kit, new charge to pancake pipe, silicone turbo elbow, new plugs , new rocker cover gasket set , tb clean and no codes lol ooh the joys anyone any ideas thinking n75 or map sensor?
