1972 Audi 100 dieing

harmeetjohal · 20-10-10, 10:48 PM

hi all need a little help with the Audi 100, its a 1972 1.9 engine
while driving, after a few miles it starts to cough and spit, and if i take it out of gear car seems to turn itself off (revs drop) and if im quick enough i can keep her alive, if not she dies... so dies at every traffic light.
i gave put new sparks, coil, distrubutor cap and arm, put in a new batt last night as old one died
what could it be?

im guessing ignition or alternator but its just a guess (i am rubbish with cars) any ideas?

need it for friday (using her as a wedding car) so need this fixed in the morning

Coxy · 20-10-10, 10:54 PM

My best guess is the carburettor, as it's sounds like a fuelling issue.
You could have some crap in the jets which just need removing and blowing out.
Take the top off the air filter and then have a look and see how much fuel is getting in to the carb with small amount of throttle. A nice steady flow and the jets ok, but if not, then that's where the problem could be.
Can't remember if that had an in-line fuel filter fitted or not either? If it does, check the fuel level in the filter.
It's going to be something very simple as these engine are very basic and easy to work on.

missfire · 20-10-10, 10:59 PM

sticky choke..(if not starvation-as above) , flooding? i had a carby car that did the same thing as you describe. the carb had baked in the heat over the years and got ...sticky. WD40 sorted it for a while, but ended up getting a good greasing!

harmeetjohal · 20-10-10, 11:32 PM

Would an air leak cause the problem?

Steev · 20-10-10, 11:51 PM

happened to me on a Viva, it was condeser, one on ebay at moment for Audi, was gonna buy it myself but suggest seriously u do. its a cheap buy, but cheap fix if it is the problem
rgds
steve

Steev · 29-11-10, 10:03 PM

Hi did u get this sorted at all?

Nierca_Quattro · 29-11-10, 11:26 PM

did you fixed the problem? what was is it?

urS6 · 29-11-10, 11:42 PM

Have those cars got a fuel cut-off solenoid on the fuel intake to the carb? I had problems with one of those years ago (can't remember if it was the valve or the wiring) and I remember the symptoms were cutting out at traffic lights.

Unlikely to be alternator unless new batteries keep going flat.

More likely to be fuel related than ignition related, especially as you've replaced almost everything.

harmeetjohal · 30-11-10, 07:34 AM

Yip it was the fuel filter.... also changed the fuel pump as it was leaking..mm worked a treat, and used it as my bro in-law wedding car

Thanks all for Ur help

20-10-10, 11:32 PM	#4
harmeetjohal Grown up member Classic Audi Club Member Join Date: Jun 2009 Posts: 268	Would an air leak cause the problem? __________________ http://i114.photobucket.com/albums/n...line/Vc8AN.jpg

20-10-10, 11:51 PM	#5
Steev Grown up member Classic Audi Club Member Join Date: Aug 2009 Location: Cheshire Posts: 872	happened to me on a Viva, it was condeser, one on ebay at moment for Audi, was gonna buy it myself but suggest seriously u do. its a cheap buy, but cheap fix if it is the problem rgds steve __________________ Lots of Audi 100 C1 saloons (1973-77) Audi Coupe S (1972) Audi WR Turbo (1987) NSU RO 80 1975 (look it up!) Vauxhall Cavalier Mk1 2000 GL 1979 Vauxhall Cavalier Mk1 1900 GL Coupe 1978 Vauxhall Viva HB 1967 (45HP beast!)

29-11-10, 10:03 PM	#6
Steev Grown up member Classic Audi Club Member Join Date: Aug 2009 Location: Cheshire Posts: 872	Hi did u get this sorted at all? __________________ Lots of Audi 100 C1 saloons (1973-77) Audi Coupe S (1972) Audi WR Turbo (1987) NSU RO 80 1975 (look it up!) Vauxhall Cavalier Mk1 2000 GL 1979 Vauxhall Cavalier Mk1 1900 GL Coupe 1978 Vauxhall Viva HB 1967 (45HP beast!)

29-11-10, 11:42 PM	#8
urS6 Grown up member Join Date: May 2010 Location: Worcestershire Posts: 115	Failing fuel cut-off solenoid? Have those cars got a fuel cut-off solenoid on the fuel intake to the carb? I had problems with one of those years ago (can't remember if it was the valve or the wiring) and I remember the symptoms were cutting out at traffic lights. Unlikely to be alternator unless new batteries keep going flat. More likely to be fuel related than ignition related, especially as you've replaced almost everything.

30-11-10, 07:34 AM	#9
harmeetjohal Grown up member Classic Audi Club Member Join Date: Jun 2009 Posts: 268	Yip it was the fuel filter.... also changed the fuel pump as it was leaking..mm worked a treat, and used it as my bro in-law wedding car Thanks all for Ur help __________________ http://i114.photobucket.com/albums/n...line/Vc8AN.jpg

20-10-10, 10:54 PM	#2
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,216	My best guess is the carburettor, as it's sounds like a fuelling issue. You could have some crap in the jets which just need removing and blowing out. Take the top off the air filter and then have a look and see how much fuel is getting in to the carb with small amount of throttle. A nice steady flow and the jets ok, but if not, then that's where the problem could be. Can't remember if that had an in-line fuel filter fitted or not either? If it does, check the fuel level in the filter. It's going to be something very simple as these engine are very basic and easy to work on.

20-10-10, 10:59 PM	#3
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,156	sticky choke..(if not starvation-as above) , flooding? i had a carby car that did the same thing as you describe. the carb had baked in the heat over the years and got ...sticky. WD40 sorted it for a while, but ended up getting a good greasing!

29-11-10, 11:26 PM	#7
Nierca_Quattro Grown up member Classic Audi Club Member Join Date: Nov 2010 Location: Bedfordshire Posts: 862	did you fixed the problem? what was is it?