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Topic: speedo not working on 24v cosworth (Read 1003 times) |
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johnnocosworth
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speedo not working on 24v cosworth
« on: Jul 19th, 2007, 1:06pm » |
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Hi,
picked up my new car last night, its a r plate scorpio cosworth.
Its a great car, but the speedo doesn't work.
The previous owner told me that it had had a flat battery and after he had charged it, all the needles went around when he started the car.
All gauges now work, but it looks like the speedo needle is below the 0mph stop?
When I turn on the ignition, the needle does move slightly.
Any ideas how to fix this? as guess my speed isn't good fun with all the cameras around where I live.
Thanks
John
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: speedo not working on 24v cosworth
« Reply #1 on: Jul 19th, 2007, 4:26pm » |
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Welcome to the site 
Two reasons I can think of.....the needle has somehow jumped over the stop & is stuck the wrong side of it or the VSS (vehicle speed sensor) needs replacing 
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Kjetil S
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2001 BMW 520iat
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Re: speedo not working on 24v cosworth
« Reply #2 on: Jul 19th, 2007, 4:54pm » |
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I would guess on the first one. It's not uncommon for the needles to get stuck behind the plastic stops.
You can try using a lenght of thin steel wire and gently press it in between the odometer button and the "glass". Hopefully this will allow you to move the needle back in place. If not, you'll probably need to take the instrument cluster out, unless someone else has an idea.
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
 
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Re: speedo not working on 24v cosworth
« Reply #3 on: Jul 19th, 2007, 6:36pm » |
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Precision engineered, technical THUMP on the top of the dash 
Common fault, the needles always flick around after the battery has been disconnected, sometimes the speedo gets wedged there.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Ultima2300
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RIP Blue 2.3 Ultima / White 2.0 8v Executive
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Re: speedo not working on 24v cosworth
« Reply #4 on: Jul 19th, 2007, 6:55pm » |
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on Jul 19th, 2007, 6:36pm, TiberiuS wrote:| Precision engineered, technical THUMP on the top of the dash |
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Bruce - I believe it's technically referred to as "percussive maintainence"
Geoff
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
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Re: speedo not working on 24v cosworth
« Reply #5 on: Jul 19th, 2007, 7:20pm » |
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...or concussive maintenance if you happen to thump the wrong object  
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Spannerdemon
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Re: speedo not working on 24v cosworth
« Reply #6 on: Jul 19th, 2007, 7:39pm » |
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If you do end up taking the cluster out, DON'T lay it down flat on the lens.
Can't remember why, but I know it does nasty things to it. Can anyone give more info?
The cluster surround is only held in with 4 screws so might be worth just undoing it, and lifting the needle back over the plastic stop. It bounces over this when the needles flicker round.
Bruce's idea of a good thump on the top of the dash (as you go over a bump) is non-technical......but works.
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pete from Hull
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Non Scorpio at the moment, but still interested...
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Re: speedo not working on 24v cosworth
« Reply #7 on: Jul 19th, 2007, 10:34pm » |
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on Jul 19th, 2007, 7:39pm, Spannerdemon wrote:If you do end up taking the cluster out, DON'T lay it down flat on the lens.
Can't remember why, but I know it does nasty things to it. Can anyone give more info?
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I think it has some sort of oil damper inside which can leak out.....
pete
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Simmo
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Re: speedo not working on 24v cosworth
« Reply #8 on: Jul 20th, 2007, 9:45am » |
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S/D. THIS is what you are thinking of I suspect BUT it does not explain why so Pete may be correct.
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Spannerdemon
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Re: speedo not working on 24v cosworth
« Reply #9 on: Jul 20th, 2007, 12:13pm » |
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That's the one Mike.
Many Thanks.
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johnnocosworth
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Re: speedo not working on 24v cosworth
« Reply #10 on: Jul 20th, 2007, 5:55pm » |
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Hi,
thanks for all advice, I've just spent an hour sitting in the car, and have released the dash trim and the plastic screen over the dials, I then lifted the needle over the stop, put it all back together and have been for a test drive. ....it works!
John
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