having trouble with my boost, if my s3 is driven fast (foot flat to the floor through the gears ) the boost spikes right up 2 bout 14 psi and holds bout 10 ish. but if driven normaly ie on the motorway, and then i go to accelerate the boost struggles to build up and barely reaches 8-9psi.also as the boost gauge is climbing it seams to be fluxtuating up and down, could this be the dv not holding the pressure??
its not had a re-map,also got new n75(j), and checked for leaks!!