Help with my Speedo.

[fozzy280472]

Hi chaps ,
After some help again . Pretty much got the interior refurb wrapped , but noticed my Speedo is sitting at 40mph when the car is off and not dropping back to zero.
I haven't driven the car yet ( I have the plenum off and am in the middle of resealing the injectors and fuel rail.) But is this likely to reset itself on a road test or am I looking at new Speedo time . I have checked the connections and confirmed the earth is ok .
Car is a 2.9 S3 . Also the rev counter is sitting at 1000rpm when the car is off but I have heard that the rev counter can stick at its last reading on switch off.
Anyone got any ideas please .....?
Getting a bit fed up ...fix one thing and another bu**ers up.

[RayTVR]

That's normal for the tacho - Mines in the kitchen and still doing a thousand RPM.

Just checked and the Speedo is also at 40MPH, it was working fine when it came out a couple of days ago so I would say nothing to worry about..

[fozzy280472]

Cheers for the reply Ray , like yours , mine had both been out for a while whilst having the dashboard refurbed , maybe I need to get the Speedo back in and give it a run .
Any other ideas / advice gratefully received.

[phillpot]

fozzy280472 said:

Getting a bit fed up ...fix one thing and another bu**ers up.

That's old TVR's cars for you

[Penelope Stopit]

fozzy280472 said:

Cheers for the reply Ray , like yours , mine had both been out for a while whilst having the dashboard refurbed , maybe I need to get the Speedo back in and give it a run .
Any other ideas / advice gratefully received.

Sticking armatures will very likely be the cause

[MisterTee]

Mine has been laid up for some time now without a battery and I noticed just the other day that it was doing 40mph! Never done that before, so I suspect it’s something to do with being disconnected from the any source of power.

Edited by MisterTee on Saturday 13th April 13:29

[fozzy280472]

Cheers for the replies chaps , I guess I'll put it back in and go for a run and see how goes .

[Alan Whitaker]

TVR's are so fast they do 40 MPH standing still

[fozzy280472]

Hi chaps , so car is now mot,d but Speedo still not working .
Can I ask someone who has a spare one to hand if they can post a picture of the rear of it , I've been reading up and it seems some think there is a case earth as well as the plugged lead and others say there isn't.
Before I get the poxy thing out again and send it for repair , I want to check I've covered all bases ?
Hope someone can help and thanks in advance .

[RayTVR]

Mine had a two core cable with the screen acting as the ground. No separate earth to the case anywhere. It's back in, and working fine..

[chiefyo]

Can't upload an image. But checked my spare and definitely an earth tab on a threaded stud next to the bulb holder. I also remember having same problem as you by not fitting earth after a dash removal.

[fozzy280472]

Feel free to call me a total t**t , next time I'll connect the case earth which I "found " amongst the mass of wiring behind the dash . A mistake any s**t engineer could make ...... I "cleverly" removed the tab from the stud so couldn't remember it being fitted on the dash rebuild.
Cheers all for the replies .

Edited by fozzy280472 on Thursday 2nd May 21:50