I have a secs monitor and have just done my msd coil pack conversion, is there any way to stop the secs from reading half RPM? will it accept the signal from pin 21 the tacho output? or will this cause damage? Anyone know if this is possible.

 

I had the same problem when I installed my SECS monitor, I came up with a solution using a pair of Zenner diodes on both the ignition amplifier outputs on the ecu and then taking one wire to the monitor, never tested it tho.

Also around the time I was dabbling in this, Simon said he was going to release an update to the software for people with the coilpack conversion to get the rev counter to read correct - not sure if he ever got round to doing it tho