Author Topic: Rev counter reading wrong  (Read 2276 times)

Offline Booney907

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Rev counter reading wrong
« on: 24 August 2011, 23:25 »
Hi
I've recently replaced my Mk3 Gti 8v clocks with some VR6 ones as my 2nd lcd display wasn't working which annoyed the hell out of me  :angry:

They work great except the rev counter is out, thought this might happen as there from a VR6, anyone know of a fix for this? or should i just live with it?

Not sure how much out they are, it's idling at 500 instead of the 1000 it used to

Any suggestions would be appreciated :grin:

Cheers

Chris

Offline Wayne

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Re: Rev counter reading wrong
« Reply #1 on: 24 August 2011, 23:32 »
I think you need to switch back to 8v clocks, don't think the speedo will be correct as well.

Offline Booney907

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Re: Rev counter reading wrong
« Reply #2 on: 24 August 2011, 23:35 »
Really? Hmmm Looked about right, will do a rolling test with me sat nav and check

Offline Wayne

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Re: Rev counter reading wrong
« Reply #3 on: 24 August 2011, 23:36 »
Really? Hmmm Looked about right, will do a rolling test with me sat nav and check

8v is 140mph, 16v and VR is 160mph from memory

Offline boneybradley

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Re: Rev counter reading wrong
« Reply #4 on: 24 August 2011, 23:38 »
the rev counter wont read correctly due to them being set for 6 cylinders, you can use 16v clocks and they will be accurate (and I recon the speedo will be fine on both as that uses a pulse from the drivetrain rather than from the engine)
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Offline dom

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Re: Rev counter reading wrong
« Reply #5 on: 24 August 2011, 23:46 »
I've got an old set of non-working clocks that I was about to bin, I can take the lcd screens out and stick them in the post if you like? You can maybe repair your old 8v clocks?

Offline Booney907

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Re: Rev counter reading wrong
« Reply #6 on: 24 August 2011, 23:48 »
Yeah they are 160mph and the 8v 140 or 130

As long as the speedo is ok i'll keep them, i'd rather have a rev counter reading a little wrong than my old clocks with an illuminated lcd that doesn't display anything
Plus the LED bulbs display so much better with these as i could remove the filter, old ones were quite dim

I suppose if the rev counter annoys me enough i'll be on the lookout for a VR6 lump sooner than expected! lol

Offline Booney907

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Re: Rev counter reading wrong
« Reply #7 on: 24 August 2011, 23:54 »
Cheers anyway Dom but i think it's a bit more than just the LCD, if you disconnect the clock and reconnect it displays fine, then after 5 mins it shows a small bit of some writing, i can still see the arrow showing whether it's on mpg, temp etc but the mfa button doesn't move it at all, think the actual board is glitched/fried somewhere

Offline dom

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Re: Rev counter reading wrong
« Reply #8 on: 24 August 2011, 23:58 »
Cheers anyway Dom but i think it's a bit more than just the LCD, if you disconnect the clock and reconnect it displays fine, then after 5 mins it shows a small bit of some writing, i can still see the arrow showing whether it's on mpg, temp etc but the mfa button doesn't move it at all, think the actual board is glitched/fried somewhere

Fair enough, I had a screen go in my first Mk3 and it was just a case of replacing it. Yours sounds as if it's something more sinister though :grin:

Offline VR6_Wherry

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Re: Rev counter reading wrong
« Reply #9 on: 25 August 2011, 16:55 »
Cheers anyway Dom but i think it's a bit more than just the LCD, if you disconnect the clock and reconnect it displays fine, then after 5 mins it shows a small bit of some writing, i can still see the arrow showing whether it's on mpg, temp etc but the mfa button doesn't move it at all, think the actual board is glitched/fried somewhere

Fair enough, I had a screen go in my first Mk3 and it was just a case of replacing it. Yours sounds as if it's something more sinister though :grin:

Feel free to post them to me!  :grin: :kiss: