Right guys I'm new to this forum and I don't have much mechanical knowledge but I have given my Audi A4 1.9 TDI Y reg into 3 garages they have kept it for 2 weeks a time and they cannot solve the problem so I am hoping some bright spark on this forum can answer the question.
Right when my car is parked overnight and I go in the morning to start it up sometimes it will fire straight away as it should and jobs a good'un but there are times where it will turn over for around a minute maybe a minute and a half (no exaggeration) and will eventually fire up. When this is happening it is as though it is attempting to fire up but the turn over is quite slow until it eventually fires up. I have had fuel filter changed numerous times and had injector seals checked.
This will only happen once in the day or if it stood for a number of hours, once started you can turn off and start the car as many times as you please. Could it be a fuel pump issue as one of the 3 mechanics said fuel pump is slightly low pressure but the part and labor are not cheap and don't want to waste money throwing it at the car. I say it only happens when it is parked overnight but it will happen if parked nose up on a hill after around an hour. I have been advised it is possibly a fuel leak, are there any common places where these cars leak, I love my Audi but it's getting annoying as nobody can diagnose it.
Please someone with some possible past experience with this issue or a Audi guru please point me in the right direction, I will be forever grateful.