I have an EMS Stinger 4 ECU with tacho output and can't get the V6 Hilux (3VZ) taco to recognise the signal, so need someone to calibrate/alter the taco so it does.
BTW, have tried 1,2 & 3k Ohm resisters added to the feed, as suggested, but with no joy. Apparently one has/needs a square wave and the other a curved wave which is why they currently have the sh!ts with each other and are not talking
![Mad :x](./images/smilies/icon_mad.gif)