Right, I removed the inlet manifold to clean up and noticed the oil breather pipe underneath it had a 2" cut in it so I replaced it, the car feels a lot quicker but after 5 minutes driving the oil pressure light comes on/off. Big red sign and three beeps! it doesn't do it at idle only when driven mainly above 2k rpm or when boost comes on. My guess is the oil pick up is blocked, car has done 141k and last oil was changed in July. Can anyone please shed some light on this. or if you previously had this issue! could this be the oil pump? I hope not. p.s. sensor looks ok.