Nismo Dash Problem

[tricstar]

I've got a brand new still in box Nismo dash that came with my car but not installed,

When I fitted it the tacho is about 600-800 too high and there is no adjustment, any ideas what to do...?

anyone have a 33 GTR and prepared to pull the dash out and check it on theirs ??

[GTS-t VSPEC]

An insufficient power or ground will cause a tachometer to actually read too high. If you are experiencing this problem, perform the following:

Using a voltmeter (not a test light), measure across the Red wire and Black wire coming from the tachometer while the engine is running. DO NOT USE AN ALTERNATE GROUND! By doing this, you will be looking at what the tachometer sees for power and ground, combined. If you measure below 12.0 volts, identify which connection is the problem, and correct it.

I found this on the web, not sure how useful it is, but it's probably a good starting point

[tricstar]

I found this on the web, not sure how useful it is, but it's probably a good starting point

thanks Paul, I should have thought of that, google has all the answers

I will try and check that out, finding those wires will be half the battle.. but the odd thing is the standard dash reads normal ??

Maybe the Nismo one is a bit more sensitive ??

[GTS-t VSPEC]

thanks Paul, I should have thought of that, google has all the answers

I will try and check that out, finding those wires will be half the battle.. but the odd thing is the standard dash reads normal ??

Maybe the Nismo one is a bit more sensitive ??

It can quite easily be due to a change in resistance, possible caused by a dry solder or poor connection. This will reduce the voltage available to the cluster, which could explain the higher reading. So I'd also measure the resistance across the terminals on the cluster side, as that is the most likely candidate.

[tricstar]

All sorted

for future reference : I pulled the face off and then unscrewed the tacho out of the dash, there is a calibration screw on the side of the tacho assembly, so I screwed the tacho back in to the dash, unscrewed the oil pressure gauge out of the dash so once the dash is plugged in I could still access the calibration screw, the rest is pretty simple, start car, turn screw to set tacho at known idle rpm, take dash back out and put it back together and your done

now I can see how fast I'm going in 4th gear on the track of course

[GTS-t VSPEC]

Cool, good stuff