Jumpy Taco Needle

[shane_game33]

Hey just bought a skyline r33 turbo and its taco needle is all over the place, fluttering from betweek 3000-9000 rpm all the time. rarely is acurate and spends most of its time past red line.

wat could be causing this guys?

all help and input appreciated.

[PsYLoR]

Either the tacho needle has been bumped and could have a loose connection, or it'll be a wiring issue somewhere.

I have the same prob, thought I fixed it but the problem soon returned.

Ive got a PFC so i can use the hand controller to show revs (its signal is fine).

So for me i know that the ecu is getting a good rpm signal but the problem is happening either at the tacho or in the wire that runs from the ecu to the tacho. Still yet to fix it. ;(

If i give the dash a hit it usually fixes itself (for a bit). lol