Quote:
Originally Posted by GNP
dok47,
My 2001 X5 4.4i has a saddle bag gas tank and there is an extra fuel pump to pump the fuel from one saddle bag to the other.
If that extra pump fails, one of the saddle bags will run dry, while the gas gauge still shows 20 liters, since there is still fuel in the other saddle bag where the gauge is.
So actually, you only have 10 liters left, since the 20 liters is all on one side and the other side is dry. If the 20 liters was half pumped over to the other side, the guage would only show 10 liters left.
Howvere, the primary fuel pump is located in the saddlebag that is dry and thus you can't start the engine, even though you have fuel in the tank on the other side.
As long as you always keep at least a 1/4 tank of gas, you should not have to replace the broken pump, since a 1/4 tank is high enough to spill over the top or the hump in the saddle bags.
I had to replace the fuel filter at the same time that I replaced my broken secondary fuel pump. However, the fuel filter on my 2001 X5 4.4i was not made to be replaced.
So the secret here is that if you run out of gas and the gauge still shows 20 liters or so, just put more fuel it it and you'll be good to go, no need for a tow. However, you still would have to get the gas delivered to your vehicle.
|
Thanks for your help. In my case I took out pump on right side where level sensor is located too. Tank was dry completely. On other side i have only another floating switch. I measure ohms on both of them and they are measuring exactly same ohms. i checked gauges and tested them they move from emlty to full position esily so they are not stuck. Engine off gauge on zero also. Whenn filling tank with around 60 liters gauges are already on max. when i runb out of fuel is shows around 20liters. it looks to me like instrument gauges unit need to be flashed with new software.?!?!
And now i will tell how it happened which is strange.
I had 2009 DVD navigation bootleg in my MK4 while driving from eastern europe to Austria. As soon as I entered Austria and TMC option was enabled on navi to receive updates about road blocks etc... it went crazy it was rebooting and after that showing empty maps and shuting down all the time. I pulled fuses for navi and BC but still same. I put 2008 bootleg navi DVD same [problem. Then I put 2006 OEM DVD Navi and it was all ok. In that moment i had 20liters in my tank. From that moment it looks like gauge has been recalibrated that o liters is at 20 liters gauge position. When i got back to eastern europe bootleg DVD Navigation 2009 was working fine. Could it be some bug that they send if you use bootleg or something. I did not have time to flesh my unit but i will let you know if that will fix the problem.
Thanks