Hello, just looking for a little bit of advice regarding my oil light flashing. It constantly flashes but when car is revved it stops flashing but stays on. I've changed the sensor so next I'm going to do the oil pressure test. I brought the car as a non runner as the belt had snapped, I've changed the whole engine but now have this issue don't want to drive it until I've investigated if I now have a dodgy oil pump. Anybody know roughly what kind of reading I should be getting and what RPM I should be at and for how long to get the reading as accurate as I can?