Hi everyone. I have an A3 1.9 Diesel Quattro sport that takes about 15 seconds to start from cold. Once its running its fine. I have had a so called Audi specialist look at it. They have changed a temperature sensor, put a non return valve on the flow from the fuel filter, changed the fuel filter twice and fitted a new fuel pump. It behaved for about a week but now we are back to not starting as it should from cold. I have a feeling its definately fuel related as the car has been on diagnostics. The glow plugs, battery, starter etc have been checked and verified. Would very much appreciate any help given.

Many many thanks. C Mesher