just bought a s2 with a dump valve fitted but not connected it is all there but the tube that goes from the inlet manifold to the top of the dump valve has been blocked off with a self tapping screw. i thought by un screwing the screw and pushing the pipe on to the top of the dump valve it would work, but it doesnt. the car wont tick over if its connected but it seems to be fine when blocked off . any advice pleease???
cheeRS chris