Hi I've got a 4x4 Saph which I've just had msd stage 2 conversion. On boost after a couple of days the rev counter started jumping around and then smoke started coming from the ignition barrel. Had a look and someone's wired in an extra wire from the ignition barrel to the ignition live on the yellow ecu relay next to the pump relay. This wire was totally melted. The normal black wire is still connected but gets no power with ignition on unless I run another wire directly from ignition barrel to the black ignition live on relay. I've bought an msd fuel pump rewire loom but I'm worried there's something wrong with the wiring to the old relay. What could cause this?
Any help appreciated