Hi . I have disco 1 300 tdi... I attached a defi zd for temps , turbo pressure etc. Most of sensors work properly. I tried to connect rpm from alternateur the result : car shows 700 rpm ... defi shows 3200-3300 rpm ... how I can reduce this signal comming from alternateur???
Thank's

 

I havent heard of the Defi before but i would expect that there is a way to change the settings, did you attach the feed to factory tach feed wire ?

 

Yes ...
I connected wire from alternator to dvice... even the divece set to maximum ( v8-11000) I read 3300 rpm on device when engin run's at 550-700 rpm...