S Tacho

[tileart]

Why doesn’t the tacho on some “S”s return to zero ? When I turn off the ignition on mine it shows 1,000 rpm, then if I turn it on then off again it zero’s. I see even the £15K one currently at Mole Valley is showing 1,500rpm with the only other gauge active being the Voltmeter showing 13v.

[MisterTee]

Mine does the same. Mine does return to zero once I have disarmed the immobiliser though.

[DelboyH]

tileart said:

Why doesn’t the tacho on some “S”s return to zero ? When I turn off the ignition on mine it shows 1,000 rpm, then if I turn it on then off again it zero’s. I see even the £15K one currently at Mole Valley is showing 1,500rpm with the only other gauge active being the Voltmeter showing 13v.

Mine does the same. I asked about it on the S Series Facebook group and no one seemed to have a definite answer. The consensus was that they all do it, although there were a few who had never had the issue. Mine will eventually creep to about 3,000 RPM even when totally disconnected.

[paul.deitch]

Mine does it too. I think that they all do. One day I'll get round to taking it apart... Until then.

[GreenV8S]

Mine also freezes when it is powered off. It behaves as if the needle is being driven positively in both directions, perhaps by a stepper motor or something like that.

[Maffe]

It’s a feature

[MisterTee]

[tileart]

Maffe said:

It’s a feature

What, you mean like artex ceilings, avocado bathrooms, and sapele doors. Ooops, that sounds like my place, must stop spending money on TVR's !