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| erratic speedo? https://forums.tipec.net/viewtopic.php?f=27&t=12651 |
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| Author: | dirty hands [ Thu Mar 29, 2012 8:53 pm ] |
| Post subject: | erratic speedo? |
the speedo on my 1985 s2 has become very tempremental,some days it works after 2 miles or so,others 15-20 or not even at all,then the next day it will work again just as above,anybody come across this before? regards d.h |
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| Author: | Brett928S2 [ Thu Mar 29, 2012 10:34 pm ] |
| Post subject: | Re: erratic speedo? |
Hi  Mine used to do that just after I bought it...lack of use i think.... Try this....next time it doesnt start as soon as you move....CLOUT the speed hard lol... It worked for me and after a couple of weeks it seemed to cure it....very occasionally it happens now (maybe 3 times a year) But I have a digital speedo now so it doesnt matter... All the best Brett
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| Author: | KatPorsche [ Fri Mar 30, 2012 2:16 pm ] |
| Post subject: | Re: erratic speedo? |
Maybe you need to replace the speedometer cable? they can become frayed and then twist until it starts working again - causing it to work erratically. |
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| Author: | dirty hands [ Fri Mar 30, 2012 6:12 pm ] |
| Post subject: | Re: erratic speedo? |
are they electric or cable?its the 928 by the way! |
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| Author: | KatPorsche [ Fri Mar 30, 2012 6:38 pm ] |
| Post subject: | Re: erratic speedo? |
Oh sorry, I just checked Pelican Parts and... 928's have electronic speedometer which requires this sender. If your gauge dies completely, then be sure to check this sender first. 928-606-210-00-M100 |
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| Author: | rapidstu [ Fri Mar 30, 2012 6:39 pm ] |
| Post subject: | Re: erratic speedo? |
My first 944 s2 did the same, it was a cheap fix, just the sender unit, i did not replace it myself as it was done with other mot work so i dont know if you can do it on your drive. |
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| Author: | Brett928S2 [ Fri Mar 30, 2012 7:07 pm ] |
| Post subject: | Re: erratic speedo? |
Hi I cannot be sure but i dont "think" its the sender....my impression is that its the needle itself sticking.... All the best Brett
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| Author: | KatPorsche [ Fri Mar 30, 2012 7:22 pm ] |
| Post subject: | Re: erratic speedo? |
Well, you could take the instrument cluster out and give it a clean somehow, maybe use a vacuum as it may have some dirt making the needle stick and use a bit of GT85 spray? God, I need to stop writing on here and get myself outside working on my own car, lol |
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| Author: | stratfordshark [ Fri Mar 30, 2012 8:55 pm ] |
| Post subject: | Re: erratic speedo? |
Likeliest cause is edge connectors at base of pod getting dirty. I think on earlier 928s you can just reach them from underneath, disconnect and then clean the contacts. I would use contact cleaner on a cotton wool bud but others have used pencil eraser. |
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