Tacho Being A Shit

[Trozzle]

Hey hombres.

Occasionally my tacho does this annoying thing where it will flick to a 6 o'clock position and sorta stay there. Video below should give you an idea on what it's doing when I turn the key. Only thing video doesn't show is that when driving with the tacho like this, if engine rpm goes about roughly 4000rpm the tacho begins to climb backwards up to 7000rpm, at which point it will stay there even when I hit the limiter until I allow revs to drop again, at which point it will drop back down to 6 o'clock.

The first few times this happened it sorta woke up and fixed itself when I hit ~4000rpm...

Engine runs fine when this is happening, so it's either a problem with the ECU aux out, or a problem with the tacho motor. If my tacho is dying, I don't really care.

[pistol-pete]

tried searching? Tacho Showing Over 9000?! - Skylines Australia

mines started doing this too. give the dash a bash when it happens, if it bounces around when you hit it, you know its just some connection or resistor in the tacho playing up. apparently theres also a calibration screw on the back of the tacho and giving it a few turns back and forth to loosen it up can help.

or take the tacho out and send it a gauge place, theyd be able to fix it.

[Trozzle]

Yeah I figured it'd be an issue with the tacho itself. I think I tried bashing the dash once but it didn't do anything, also WAAAAYYY back when my car was stock the tacho just stayed on 0 once or twice....

Ah well, as long as everything that matters is working fine, then I'll just leave it.

Cheers

[666DAN]

Isn't this due to the capacitor letting go on the back of the tacho? It's a nice cheap fix.

[luvpsi]

what do you need a tacho for haha use your ears or if you have a aftermarket ecu with hand controller use that haha

[Trozzle]

yeah exactly. The ViPEC doesn't have a hand controller (although I could sit a laptop in the passenger seat, F&F style)...I don't care too much if my tacho doesn't wanna work, as long as it doesn't affect anything else

[luvpsi]

yeah thats it i got my vl back on friday and the standard tacho doesnt work due to i dont have a tacho box for it but i dont car because i have a hand controller that tells me my rpm not that i look at it

[JKR-32]

yeah exactly. The ViPEC doesn't have a hand controller (although I could sit a laptop in the passenger seat, F&F style)...I don't care too much if my tacho doesn't wanna work, as long as it doesn't affect anything else

You don't need a laptop, just replace the tacho with a "danger to manifold" warning light. Fixed

[Trozzle]

You don't need a laptop, just replace the tacho with a "danger to manifold" warning light. Fixed

But I don't have 2 of the big ones.

I've only got 1 medium