I'm also in diesel leak hell at the moment with my 2005 Fiesta TDCi.

About a year ago I had leaky injector seals, so had these replaced. As soon as I left the garage my car was leaking diesel from underneath. It took about six visits to the garage before they finally sorted the problem citing various problems including fuel return pipes and suchlike.

All of a sudden the other day a bit of smoke was coming out of my bonnet and yet again, a huge pool of diesel underneath the car.

A different garage had a look and said they found 'a few loose parts' and sorted out a loose pipe. On the way to work from that garage, yet again diesel was leaking out of my car. Took it to yet another garage - they fixed a loose pipe. And again, today, YET AGAIN another fuel leak.

I am honestly losing the will to live. I can't hear anything, the engine sounds fine, but when I'm driving I can smell diesel and see vapour out my back window as the leaking fuel gets sucked under the car and swirls out the back.

Is the loose pipe thing a red herring and the problem the fuel injector seals? Is it likely they've been fine for a year and then all of a sudden start doing this?

Thanks very much!