How does a tacho sensor work?

[jff45]

The original 1990 td42 GQ one mate. It works fine but doesn't read below 900rpm.

There have been several cases of the tacho not working below 1000 rpm with the TD42 sensor wired directly to the TB45 tacho.
I bought a Dakota Digital tacho interface to solve that problem on mine. Mine works perfectly now.

[AB]

You used a spacer, so I guess you are using a two wire sensor?

Another bloke was having trouble too, but not a TI.

http://www.nissanpatrol.com.au/forum...ion-type-tacho

Yep, two wire sensor.

[jff45]

This is the Dakota unit


IMG_3560.JPG
...

[AB]

Interesting it's starting to read below 900rpm a bit now but shakes until 900rpm.

For what I've been through that is ok for me now, I can live with that....lol