Rev Tacho Going Backwards R33

[jetblack]

I've started my R33 GTR today and found out that my tacho was doing strange things. When the engine is idling, it works ok and shows the real rev value. But when I rev the engine a little bit, if it goes higher than 1,800rpm (approx), it begins working backways!!! The more you rev the engine, the closer you get to 0rpm!!

After a given rpm value, the needle is even stuck on 0rpm and is not moving anymore.

If you back off the throttle and let the engine slow down until iddle, the needle comes back to life and shows true rev value again (1,000 rpm).

And so on.

any ideas how to fix this? it started after i pulled the cluster out to change globes, have checked all connections and cleaned them. no avail.

ive read it may be a loose earth wire,

[Jmans GTS-T]

Hey man,

I have had the same problem for the past few months, it is driving me MAD!!!!

I have ripped out the cluster and played around with what people have suggested but nothing seems to work!!!

I think this one may be an issue under the bonnet!

If anyone knows where to look and repair under the hood please let me / us know...

PS. "Jetblack" if you have fixed yours bay now... please let me know...

Cheers Jamie

[jetblack]

its not under the bonnet as i have replaced my cluster with another one and it works fine, im guessing its one of the resistors on the back of the tach

[Jmans GTS-T]

Cheers man.... Looks like I will do the same thing!!!!

[TerribleOne]

I had a similar thing happen to mine so I pulled the cluster out and then pulled the speedo out, very carefully re soldered every joint and never had the problem again.

[jetblack]

tried that, resoldered everything on the tach but still no fix,

im guessing one of the capacitors was gone

[SargeRX8]

Blown caps are easy to find. Measure the resistance of the resistors and see if they are in accordance with their ratings. Or just but a new taco our test one out somewhere