Hi i own a 01 tdi a3 (110bhp)
ive noticed that as i go up hills its lagging in power, and its not that good on the flat.
i dont know whats wrong,
ive had the following things looked at:

[ul][*]fault codes - nothing[*]EGR valve - didnt do anything[*]Fuel filter cleaned out - nope[*]cat checked - nothing[*]turbo checked - nope[*]blocked air filter - nope[/ul]
so if anyone can help me id grately appreciate it as im pulling my hair out (and the mechanics are too)
cheers