Gt4 Problem

[scooby -doo]

i have a st185 gt4 Carlos Sainz, i has no get up and go at all ! its filling the boost gauge inside the car , reving ok wilst parked ! it also has a mil light on in dash , it has really only started this since a k&n filter was fitted to it ! any ideas wud be very gratefull! thanks

[GTForbes]

of the top of my head you could have damaged the pipe work, check everything after the AFM to ensure there's no holes.

check my sig for a link to a very helpful site RE-engine codes and anything GT4 related, not mine but it's just a great site