Fuel to engine problem Audi 80 Sport 84'

80sport_owner · 02-03-10, 06:23 PM

Hello,
I am experiencing problems with my Audi 80 sport (1984)
Recently my car has been stalling due to what seems to be a lack of fuel getting to the engine. I have tried changing the fuel filter and clearing out some of the crap that's in the plastic reservoir near the electronic fuel pump. (sorry about my lack of knowledge coming out in my writing)

Basically what happens is: I turn the ignition over and can hear the pump working and the relay ticks twice indicating it seems to be working. I will then be driving along and the fuel pump starts making a loud struggling noise then i start to feel the engine stalling with lack of fuel.

Any ideas to answer my probably dumb ass question?

Thanks,
Mark

missfire · 02-03-10, 10:25 PM

get a new fuel pump....................

Hanuman · 02-03-10, 11:09 PM

Does the car run normally for the rest of the time? How long before the symptoms occur after starting?

It could be you are pulling bits of debris from the tank. Have you checked the filters again?

Fuel flow test. Fuel injection pumps for K-jet (I'm going to feel really daft if it isn't K-jet, or even injection) should deliver about 4ltr/min, as measured on the return to the fuel tank. And about 5bar pressure.

There's been some discussion over on the other channel- http://www.quattroforum.com/forum/wr...ving-fuel.html

and here, for the ur, but the basics can be applied to all similar era machinery
http://www.isham-research.co.uk/quattro/fuel_pump.html

Coxy · 02-03-10, 11:09 PM

a new fuel pump would be my first port of call.

Sounds like it could be on the way out. I had similar symptoms with my old coupe a few years go.
Word of advice, Audi can get them but go to GSF as they were less than half the price of what the main dealer quoted and had them in stock.

BIGGYIN · 02-03-10, 11:17 PM

Does it have 2 filters,like mine?Small plastic(gravity)one,then a larger metal canister one nearer pump?

missfire · 02-03-10, 11:20 PM

try running it with the fuel cap off..............?? blocked tank vent

80sport_owner · 02-03-10, 11:29 PM

Quote:

Originally Posted by BIGGYIN

Does it have 2 filters,like mine?Small plastic(gravity)one,then a larger metal canister one nearer pump?

Yeah it has the 2 filters. Ill try having the cap off for a while. I just didnt want to go spending money on pumps if it is still working. (student budget)

What happens is ill be driving for about 500 yards then it will stall but fuel pump seems to be struggling. Perhaps there is still shit in the tank.

It then starts fine, so im driving along and having to coast for a bit while i turn the key to pump some more fuel in. It then seems to last as long as that small amount of fuel lasts. And yes it is K-Jet and my 'car expert mate' knows sod all about really.

Ta for replies kind people

Coxy · 02-03-10, 11:31 PM

how noisy is the fuel pump???????

80sport_owner · 02-03-10, 11:34 PM

Quote:

Originally Posted by Coxy

how noisy is the fuel pump???????

On cold start its fairly constant, when warm its quieter. With this new problem the noise gets louder as it is about to stall. When i changed the fuel filter last week it was pumping fine but sounds like its struggling.

Coxy · 02-03-10, 11:36 PM

Quote:

Originally Posted by 80sport_owner

On cold start its fairly constant, when warm its quieter. With this new problem the noise gets louder as it is about to stall. When i changed the fuel filter last week it was pumping fine but sounds like its struggling.

If the noise gets louder before it's about to stall, it could be a fuel blockage before the pump.

Sounds like something is restricting the fuel flow which is causing the pump to do that.

02-03-10, 11:09 PM	#3
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,016	Does the car run normally for the rest of the time? How long before the symptoms occur after starting? It could be you are pulling bits of debris from the tank. Have you checked the filters again? Fuel flow test. Fuel injection pumps for K-jet (I'm going to feel really daft if it isn't K-jet, or even injection) should deliver about 4ltr/min, as measured on the return to the fuel tank. And about 5bar pressure. There's been some discussion over on the other channel- http://www.quattroforum.com/forum/wr...ving-fuel.html and here, for the ur, but the basics can be applied to all similar era machinery http://www.isham-research.co.uk/quattro/fuel_pump.html __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

02-03-10, 10:25 PM	#2
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,156	get a new fuel pump....................

02-03-10, 11:09 PM	#4
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	a new fuel pump would be my first port of call. Sounds like it could be on the way out. I had similar symptoms with my old coupe a few years go. Word of advice, Audi can get them but go to GSF as they were less than half the price of what the main dealer quoted and had them in stock.

02-03-10, 11:17 PM	#5
BIGGYIN 4 ring whore! Classic Audi Club Member Join Date: Mar 2009 Location: Merseyside Posts: 7,976	Does it have 2 filters,like mine?Small plastic(gravity)one,then a larger metal canister one nearer pump?

02-03-10, 11:20 PM	#6
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,156	try running it with the fuel cap off..............?? blocked tank vent

02-03-10, 11:31 PM	#8
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	how noisy is the fuel pump???????