Hi all ive a RWD mk3 escort, im running an after market ECU mtech automotive V4, the issue i have the 5v output wire for the tacho wont run the tacho, as the tacho needs a 12v pulse signal, ive been told there is a diode kit that will sort this out, but im having trouble getting hold of the chap. as anyone got any ideas how i can sort this, cheeRS