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 Post subject: Rev counter stopped working
PostPosted: Wed Aug 05, 2015 6:48 pm 
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Location: South Wales - Abergavenny
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Hello all,

Just picking a brain or two...

The Rev counter on my 2.7 Lux is not working...drives fine, even the fuel consumption meter is reading (all be with unverified accuracy)

Are there any common faults, is it easy to change inside a clock set if needed? All other clock set parts work fine!

Any pointers would be helpful, it's just I wouldn't mind if working in case get a non start and could diagnose from rev counter bounce (if it works)

Many thanks

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1989 2.7 Zermatt Silver LHD


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 Post subject: Re: Rev counter stopped working
PostPosted: Wed Aug 05, 2015 9:13 pm 
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Tacho was playing up on the S2....took it out and re soldered all the joints on the PCB....fixed :D

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 Post subject: Re: Rev counter stopped working
PostPosted: Wed Aug 05, 2015 10:10 pm 
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Many thanks whitey, I take it its only the few connections at the rear without splitting the clockset?

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 Post subject: Re: Rev counter stopped working
PostPosted: Thu Aug 06, 2015 6:13 am 
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You have to take the gauge out of the cluster and remove the face to access the board.

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'02 Boxster 3.2S Tiptronic, in Basalt black.


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 Post subject: Re: Rev counter stopped working
PostPosted: Fri Oct 02, 2015 9:20 pm 
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I've got the same problem. Did this fix work for you too? Where is the fuel consumption meter? I can't remember seeing it in my 2.7...

Can you remove the gauges without removing the steering wheel?

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 Post subject: Re: Rev counter stopped working
PostPosted: Sun Oct 04, 2015 7:35 am 
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You will have to remove the steering wheel. If you have an MPG gauge, it is in the bottom of the tacho.

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 Post subject: Re: Rev counter stopped working
PostPosted: Sun Oct 04, 2015 8:47 am 
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white944 wrote:
You will have to remove the steering wheel. If you have an MPG gauge, it is in the bottom of the tacho.


I don't think I have an MPG gauge then. Will get the dials out next week and get it sorted. Hopefully that's all it is.

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 Post subject: Re: Rev counter stopped working
PostPosted: Mon Oct 19, 2015 6:15 pm 
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white944 wrote:
You will have to remove the steering wheel. If you have an MPG gauge, it is in the bottom of the tacho.

The fuel consumption gauge is at the top of the tacho on my square dash 944. Removing the steering wheel is the easy part - it's getting the indicator and wiper switches off together with their plastic surrounds (without cracking the latter) and then disconnecting the speedo cable that are the tricky bits.

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If it ain't fuel then it'll be sparks, except when it ain't sparks, in which case it'll be fuel.
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1959 Austin Healey 3000 Mk 1
1985 Porsche 944
1999 Massey Ferguson 4225
2018 Fiat 124 Spider


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 Post subject: Re: Rev counter stopped working
PostPosted: Mon Oct 19, 2015 6:28 pm 
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gothatway wrote:
white944 wrote:
You will have to remove the steering wheel. If you have an MPG gauge, it is in the bottom of the tacho.

The fuel consumption gauge is at the top of the tacho on my square dash 944. Removing the steering wheel is the easy part - it's getting the indicator and wiper switches off together with their plastic surrounds (without cracking the latter) and then disconnecting the speedo cable that are the tricky bits.


Sounds like the square dash is a lot harder than the oval dash.

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Porsche 911 997 Carrera S in slate grey Purchased October 2018


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 Post subject: Re: Rev counter stopped working
PostPosted: Mon Oct 19, 2015 6:35 pm 
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Digi944 wrote:
Sounds like the square dash is a lot harder than the oval dash.

I have heard that that is the case. Actually undoing the speedo cable is not quite such an issue - it's connecting it up again that's the real PITA. Shame Porsche didn't go electronic a few years earlier.

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If it ain't fuel then it'll be sparks, except when it ain't sparks, in which case it'll be fuel.
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1959 Austin Healey 3000 Mk 1
1985 Porsche 944
1999 Massey Ferguson 4225
2018 Fiat 124 Spider


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 Post subject: Re: Rev counter stopped working
PostPosted: Mon Oct 19, 2015 7:13 pm 
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I removed my tachometer and sorted the usual dry joint issue with the 3 wires but this isn't the reason mine isn't working. Any other suggestions as to common problems?

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 Post subject: Re: Rev counter stopped working
PostPosted: Wed Oct 21, 2015 6:40 pm 
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Digi944 wrote:
I removed my tachometer and sorted the usual dry joint issue with the 3 wires but this isn't the reason mine isn't working. Any other suggestions as to common problems?


I've taken the tachometer to bits completely, checked all the circuits and can find no reason why it's not working. Is there anything you guys would suggest I try? I've never had a problem like this that wasn't in the cluster so i'm a little confused now. Maybe I'm missing something simple? I really don't know.

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 Post subject: Re: Rev counter stopped working
PostPosted: Thu Oct 22, 2015 4:36 pm 
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Found a couple of caps had gone short. changed them and all works. I've never had my rev counter working before, do they all bounce about a bit when decelerating?

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