hi all im new to this site so here goes i have a mk4 escort xr3i cabriolet but i have fitted a rs turbo lump init but not yet finished it a freind of mine told me to make sure oil was comin up the oil retern pipe from the oil presure switch but there is non coming up so do ne of you know the problem is there a valve that releses when you screw the pipe on to both ends and how does the oil pump work does it rum off a relay or ne thing cheers