R33 Gtst rev unit

[RyanJdm]

Hey all first time poster here. 

I own an r33 and for the past couple of weeks I’ve been struggling to fix a problem with the rev unit. It will either stay completely still while driving or go all jumpy and random (I’ve heard this is notorious for skylines). 

ive tried replacing the actual rev unit itself to no avail as well as the whole back in to the speedo and rev unit which also hasn’t worked. Ive also cleaned out the connectors that feed in to the rev unit without success. 

Im completely open to any suggestions on what to do next because I’m out of ideas

[Hcr32typem]

Are you talking about the tachometre?

If youve replaced all that it could be whatever sensor sends that data to the gauge cluster. Does the car run badly or anything?

[89CAL]

Seen as it gets its info from the CAS i dare say thats not the problem.

Fairly sure there will be a wiring issue between the tach and ECU