aliw
14-01-2012, 08:04 PM
Hi all,
Whilst returing from the French Alps for our Chrismas Ski Hol, my 1999 Audi A4 2.5tdi Quattro Avant died on the French motorway (towing a caravan as well!!). Just prior to it stopping the glow plug light started flashing on the dash.
I checked a few things and the fuel primer bulb (retro-fitted) was empty, so she had run out of fuel...despite showing about 1/3 of a tank and 70 miles on the computer range (towing, so only doing 27mpg).
As we had filled up with cheap fuel in Luxembourg, I also had 2x20l jerry cans full of diesel with me. I put these in the tank, but the tank was overflowing before the second can was empty (38l ish) so I know the fuel gauge is correct (about 20l of diesel left in the tank when it stopped!).
Anyway, I couldn't bleed it at the side of the road, so called the breakdown service (had european cover!) and they eventually managed to bleed it and get us on our way again.
The day before this when we left the Alps, I started the car and started driving only to have the car fill up (from under the dash I think!) with electrical smoke!!! I checked everything I could but could not find anything not working or amiss, so drove on and had no further symptoms.
Now we are back home I have run feeds directly to the scavenge pump in the fuel tank, and it sounds as though it it pumping (drawing about 2.25A). I am now thinking that the smoke I had may have been a relay for the pump or something burning out, which I am going to check out tomorrow.
I have done some searching on the forum and people mention that the pump should run whilst cranking, and I assume that it should then run continuously when the engine is running (to keep the baffle housing/container that the injector pumps draws from full). Is this last statement correct???
If so does anyone know which relay and the location controls this pump?? I assume the ecu activates it??
Has anyone had any experience of these problems before and can let me know if I am missing anything?
If I can't get the feeds/relays sorted has anyone just ran the in tank pump continuously from an ignition controlled feed? Would there be any issues with this?
Whilst returing from the French Alps for our Chrismas Ski Hol, my 1999 Audi A4 2.5tdi Quattro Avant died on the French motorway (towing a caravan as well!!). Just prior to it stopping the glow plug light started flashing on the dash.
I checked a few things and the fuel primer bulb (retro-fitted) was empty, so she had run out of fuel...despite showing about 1/3 of a tank and 70 miles on the computer range (towing, so only doing 27mpg).
As we had filled up with cheap fuel in Luxembourg, I also had 2x20l jerry cans full of diesel with me. I put these in the tank, but the tank was overflowing before the second can was empty (38l ish) so I know the fuel gauge is correct (about 20l of diesel left in the tank when it stopped!).
Anyway, I couldn't bleed it at the side of the road, so called the breakdown service (had european cover!) and they eventually managed to bleed it and get us on our way again.
The day before this when we left the Alps, I started the car and started driving only to have the car fill up (from under the dash I think!) with electrical smoke!!! I checked everything I could but could not find anything not working or amiss, so drove on and had no further symptoms.
Now we are back home I have run feeds directly to the scavenge pump in the fuel tank, and it sounds as though it it pumping (drawing about 2.25A). I am now thinking that the smoke I had may have been a relay for the pump or something burning out, which I am going to check out tomorrow.
I have done some searching on the forum and people mention that the pump should run whilst cranking, and I assume that it should then run continuously when the engine is running (to keep the baffle housing/container that the injector pumps draws from full). Is this last statement correct???
If so does anyone know which relay and the location controls this pump?? I assume the ecu activates it??
Has anyone had any experience of these problems before and can let me know if I am missing anything?
If I can't get the feeds/relays sorted has anyone just ran the in tank pump continuously from an ignition controlled feed? Would there be any issues with this?