mines an a3 but yer i will be changin the fuel relay and have a drive see what happens then also put the earth on! would like to find out what the 4 earths are so i can unplug each one while car is on and try and make it die and throw the same fault codes up so then i canrule them out
To be honest dude, I can't remember exactly where those earth points come from, or what they are for. But I believe that they are the main engine loom earth points.
As Bill said,
follow the larger earth from the battery to the chassis and to the bell housing clamp bolt..
possible disconnection there