Runnin omex 600 management for a while now but never managed to get the rev counter working properly! Tried loads of different things but nothin seems to work......anyone know where i'm going wrong???? It's a 1990 erst on omex 600 management/coilpacks. Tried adjusting the different cranktooth patterns in the ecu settings and running a wire from the coilpack directly to the rev counter but only get half revs. Someone else must have had the same problem lol!!