Hi All and thanks for replying,
Will check starter draw and waveform. Will also check coil voltages on cranking.
Pete, yes I was also concerned about interference from the starter motor.
I replace loads of VW ignition switches but very few Audi,also it will go if you persevere on many occasions, the tacho starts to flick and the engine can be heard to fire, then if you keep going the tacho comes up and the engine starts. It certainly feels like cam/crank sensor problems as given by the codes but is it slow cranking speed, interference or the signal getting lost. I had one of these many years ago and it turned out the ECU had gone low sensitivity on one of the inputs, unfortunately ATP could find nothing wrong with this one.
Just got a gallon of unleaded for it as it ran out of fuel yesterday..... now where to put it, in the tank or on the back seat?
Shaun