AUDI A4 TDI 110 - jon
HAS ANYONE EXPERIENCED FLAT SPOTS WHEN ACCELARATING WITH THE VAG 1.9 TDI? MINE HAS GOOD TORQUE BETWEEN 1300 AND 2500 RPM BUT HAS A REAL FLAT SPOT AT 2600RPM AND I FEEL THAT THE PERFORMANCE IS NOT WHAT IT SHOULD BE AT ABOVE 3000 RPM. IT IS A 1998 110 TDI , ENGINE CODE AFN.
Re: AUDI A4 TDI 110 - David Davies
A common problem on this diesel engine is a faulty air mass sensor, or even just a dirty air mass sensor. You could clean it or have it cleaned to see if it makes any difference. Another approach would be to have the system checked for fault codes by an appropriate specialist.
Re: AUDI A4 TDI 110 - Matt
Have the cat. checked. Had to replace two that were blocked recently on 110 TDI VAG engines. Both gave similar symptoms to yours.

Regards

Matt