Ur quattro dash erratic

StoutyBoy · 19-12-15, 04:49 PM

Hi

Just got my 86 ur quattro back after a lot of recommissioning work. It's not a finished job yet but is now running properly with an mot by a respected firm.

The car has come back with a dash fault that it's never previously had and looks, to me at least, like an earth issue. Have had discussions with the garage and they had seen in themselves.

When the car starts the dash is fine for a couple of minutes and displays all values for revs, fuel, boost etc. Then it goes a bit wonky. The values all go off the scale .. Revs sit at 5k, fuel value doubles and boost and temp are off the top of each scale. Mph also wildly out. The display is fine but just incorrect values.

I've had the car 22 years and the dash has never been a problem. The car hasn't been used for the last 9 but was regularly run up and the dash was always fine. A lot of work has just been done over an 8 week period, mostly underneath and hydraulics etc.

Would welcome any pointers but I suspect iffy connections and/or earths?

Thanks

john johnson · 19-12-15, 05:07 PM

They done any welding ?

StoutyBoy · 19-12-15, 06:32 PM

Not as far as I know. Presumably that can damage components?

john johnson · 19-12-15, 07:30 PM

It has been known and dubious boost pack starting
Send it to Pete knight ( twobarboost ) on here as he's repairs and diagnoses em

StoutyBoy · 19-12-15, 08:07 PM

Ok thanks. Will have a proper look at it tomorrow in daylight too

Colin Aitchison · 19-12-15, 10:07 PM

I think in a post on one of the forums (may have been Pete Night) said that the dashes are sensitive to voltage, you don't want to jump start a digital dash quattro from another car and never turn the car over if the battery is reading low on the voltage gauge and remove the battery when welding, good luck hope you get is fixed, please post what the fault was or maybe santa will pop one below the christmas tree, if all else fails there is one on Ebay for £850, sorry I'm just so cheery at this time of year.

StoutyBoy · 19-12-15, 11:32 PM

Thanks Colin. I quite like the random display. Adds to the journey and seemingly cheaper!
I'll let you know what I find out.

john johnson · 20-12-15, 12:10 AM

It's more than likely a **** up by the garage and they rarely admit any thing trust me

Colin Aitchison · 20-12-15, 12:23 AM

Hi John, there is a solution to this, do like i do, the cars only go into garage for MOT and do all the repair and service work yourself and if you make a mess of thing you know who to blame and you know how it happened, you don't find yourself trying to second guess what the garage in there wisdom have done, and they still want paid.

john johnson · 20-12-15, 12:32 AM

Indeed

19-12-15, 05:07 PM	#2
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	They done any welding ? __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

19-12-15, 07:30 PM	#4
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	It has been known and dubious boost pack starting Send it to Pete knight ( twobarboost ) on here as he's repairs and diagnoses em __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

20-12-15, 12:10 AM	#8
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	It's more than likely a **** up by the garage and they rarely admit any thing trust me __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

20-12-15, 12:32 AM	#10
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	Indeed __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

19-12-15, 06:32 PM	#3
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Not as far as I know. Presumably that can damage components?

19-12-15, 08:07 PM	#5
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Ok thanks. Will have a proper look at it tomorrow in daylight too

19-12-15, 10:07 PM	#6
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,327	I think in a post on one of the forums (may have been Pete Night) said that the dashes are sensitive to voltage, you don't want to jump start a digital dash quattro from another car and never turn the car over if the battery is reading low on the voltage gauge and remove the battery when welding, good luck hope you get is fixed, please post what the fault was or maybe santa will pop one below the christmas tree, if all else fails there is one on Ebay for £850, sorry I'm just so cheery at this time of year.

19-12-15, 11:32 PM	#7
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Thanks Colin. I quite like the random display. Adds to the journey and seemingly cheaper! I'll let you know what I find out.

20-12-15, 12:23 AM	#9
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,327	Hi John, there is a solution to this, do like i do, the cars only go into garage for MOT and do all the repair and service work yourself and if you make a mess of thing you know who to blame and you know how it happened, you don't find yourself trying to second guess what the garage in there wisdom have done, and they still want paid.