Quick intro: I'm quite a regular on the VW Audi scene, owning a Polo G40 as well as now this A4 TDi. Used this forum quite a bit to get handy hints, but now I've finally decided to register, so hello to all!
So, my issue with the A4 is as follows:
Was driving to work yesterday and the fuel light came on. I was planning on topping up before I got to work and it had only just hit the red. A few minutes after the light came on, I got the dreaded 'miss' then loss of power and finally the engine cut out. My immediate thoughts were that the gauge was playing up and I'd ran out of fuel, so I got a friend to come to the rescue and bring a couple gallons of fuel. Topped up, fuel light out, but she refused to start.
Towed her home and starting trying to find the problem. Whipped the fuel filter off and replaced with a new one, which I first filled with diesel; still wouldn't start. So then, I tried to narrow things down. I disconnected the inlet to the mechanical fuel pump and ran some spare tubing into a small container of diesel. When cranking, fuel is drawn up but it still doesn't fire. This was also whilst jumping off a spare battery incase I was down on cranking speed.
What else should I be checking now? The fuel that's being drawn up must be going somewhere!? Should I start stripping down the injector supplies and see if fuel is getting into the cylinders? Not sure if the whole low tank is really related, but thought I'd mention it.
What do you guys think? Thanks in advance