Hi there all (help) im have a 2003 stype 3l v6 it is in limp mode has been for nearly two years now.fault comes up with knock sensors they have both been replaced 2 mechanics have looked at car and are a bit lost.the other problem is brakes.when car is started which it fires up and sounds sweet.without any hesitation.the brake pedal pulls down slightly and is putting on brakes slightly and brake lights come on.have replaced brake swith.the servo and the abs pump but no change well stuck with a beautiful car can anyone help all the best to you all rick