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cadiddy
Audi Nut



Joined: Sep 26, 2012
Posts: 76

PostPosted: Sun Nov 18, 2012 5:31 pm Reply with quote Back to top

So I picked up a '93 80 tdi yesterday and drove it home no problems other than a fair size cloud of black smoke for the exhaust if you put your foot down hard, also seems a little under powered on the hills. My initial assuption is fuel pump/injectors? overfuelling?
TIA
Cadan
 
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gunman
Bandwidth Buster



Joined: Sep 09, 2008
Posts: 552

PostPosted: Sun Nov 18, 2012 5:51 pm Reply with quote Back to top

If it's anything like the ones I've seen it will also have a blocked cat and the inlet will be heavily sooted up which wont help.

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1997 Audi A6 Avant 2.5 TDI
1998 Audi 80 cabby 1.8
1995 Audi S2 Avant

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jimdollar
Audi Nut



Joined: Sep 17, 2010
Posts: 63
Location: scotland

PostPosted: Sat Dec 15, 2012 9:30 am Reply with quote Back to top

Check the underneath of the short pressure hose(its about 2 inches wide and 4 inches long) from the turbo to the inlet manifold and see if it is soft or even burst. Over many years use oil that lies in the bottom of the hose rots it and you lose turbo pressure but the engine management system will still give you the fuel it thinks you need. very cheap and easy to replace. I had it on my 80 Tdi which I bought from my brother in law at a good price, he had been told it needed a new fuel pump and I saw it on another 80 tdi a while later.


Last edited by jimdollar on Wed Dec 19, 2012 5:01 pm; edited 1 time in total 
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5cylinderman
Needs to get out more



Joined: Sep 12, 2009
Posts: 107
Location: Dublin, Ireland

PostPosted: Sat Dec 15, 2012 11:27 am Reply with quote Back to top

Disconnect the EGR (if ifitted), its the cheapest job to do and always helps on older motors like yours. A bottle of STP diesel injector goo and a good old Italian tune up will help, depending on how the previous owner used the loud pedal.

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1995 A6 Avant 2.5TDi, AAT, 6 speed. De-catted.
1993 Coupe S2, ABY, 6 Speed, Bog Standard (for now!)

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Mike_H
Camped on the site



Joined: Mar 02, 2011
Posts: 225

PostPosted: Thu Jan 24, 2013 8:27 am Reply with quote Back to top

Other possibility is that it's not getting enough air - boost leaks, blocked intercooler, or turbo just not blowing enough air.
 
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cadiddy
Audi Nut



Joined: Sep 26, 2012
Posts: 76

PostPosted: Thu Jan 24, 2013 8:52 am Reply with quote Back to top

About a week or so ago I had a look for any loose/damaged hoses and found that the hose between the intercooler and the turbo want even attached so I remade that connection and thats cured the smoking and loss of power but I still have a whistle conning from the turbo so I suspect I've not quite made that connection fully, when I get the time I'll have another look.
Thanks for your help chaps Very Happy
 
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