In my E36, JP3 was jumpered. I removed it and bang. Fully working tacho.dave.a.cote wrote: As for the tach, JP3 on MS3X was not jumpered. I jumpered it, still no tach.
Double check wirings with BMW ETM. it's easy to make mistakes with BMW wirings
Also check the settings for tacho output in tunerstudio, then check your db37 with wirings from http://www.msextra.com/doc/ms3/hardware ... iring-ms3x .