What are the most common causes for a tdi to be heavy on fuel? ithink that my b6 2001 tdi (awx engine) is using more than it should.
New fuel filter,new airfilter,pollenfilter,oil and filter change,
The only thing i've noticed recently is that when starting (wheather engine hot or cold) it will start as soon as the key is turned (which is fine)
But now and again,(getting more frequent now) when starting it takes a good 3-4 seconds to start,its getting worse now and im worrie sooner or later it may never start!