I seem to have finally got to the bottom of this problem - it was the Camshaft Position Sensor! The first diagnosis at my local independent in 2013 indicated several fault codes and the mechanic opted to replace this Sensor but it may have been a non-genuine part. I've just had the part replaced...
I have had a similar problem with my 2003 A3 2.0 FSi (115k) as well (more on than off) for 3 years! It will normally start (roughly) after a couple of turns. I've had the crank (£50) and O2 (£780) sensors replaced with no improvement. The car has also just had a new Audi rear box (£700) and...
I have a similar problem with my 2003 A3 2.0FSi. Starts from cold fine but as soon as the engine is warm it will take 3 or more turns to fire and runs lumpy for a second or two. I had 3 fault codes recently, the camshaft position sensor, the oxygen sensor and the crankshaft position sensor...
Just to clarify, the problem with starting when warm/hot always resolves itself in the same way. On the third turn of the key the engine will fire, run lumpy for a 2-3 seconds then settles down.
I have a similar problem with my 2003 A3 2.0FSi. Anyone know if it is the temperature sensor? Starts from cold fine but as soon as the engine is warm it will take 3 or more turns to fire and runs lumpy for a second or two. I had 3 fault codes recently, the camshaft position sensor, the oxygen...
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