Hi All,

My 2006 A4 2.0 tdi (TDV) developed a problem this weekend. It has lost power. The car still drives well and can get up to 70 / 80 mph however it is slower than normal - it feels like a non-turbo diesel now.

Normally, if you put your foot down the car had a little turbo lag then would push you into your seat, however now it does not it just slowly gains speed - it still keeps up with traffic but just did not give me any confidence on motorways etc.

I cannot feel or hear the turbo kicking in. Does anyone have any ideas?

The car was serviced a few weeks ago with new air and fuel filters fitted.

Additionally, the MPG has been a little poor over the weekend (40 - 45mpg) however I was at the lakes so a lot of up and down hill driving. I have actually found this A4 not to be as great on fuel as my last A4 (a 2005 2.0 tdi also - which could return between 55 and 65 mpg) this one seems to average 50 to 55mpg - I've never managed to get near to 60mpg.

Any help would be greately appreciated.

Matthew