No fire to coils after cam position sensor replaced in 2001 Audi a6 quattro

Remove the spark plugs and measuring the distance through the plug holes with a rod, very gently turn the crankshaft (either way) until you are certain all the pistons are well below tdc and then gently bring the camshaft(s) to the timing position, followed by bringing the crank to the timing position.

there is a special tool as there are no timing marks, in front of the cam gears are plates with two holes in each (for location of tool) there is also a tool that protrudes into the crankshaft position sensor hole.. if you dont have access to the specialty tools , than i would engrave marks on the gears and covers to align to original positions.

Your crank sensor is bad. That is also what causes a no start like you are experiencing. The crank sensor takes the place of a distributor and tells the computer what position the engine or crank is at so it knows where to send the spark. You are going to need to have the crank sensor replaced.

take it to a dealer ,because it could be a immobilisor problem

i have a 2001 Audi A6 quattro 95,000 miles when i change gear the car seems to over rev or keep reving when i put my foot on the clutch for a split second chould you tell me why is this

CAMSHAFT POSITION SENSOR

I have a 1995 AUDI A6 QUATTRO, and it had similar problems which the AUDI repair shop had to fix.

check output voltage of altenator if its above 15volts change it

did you check wires ? common problem spark plug wire failure
check if you get spark in wire, if you don't there is a problem within in the wire, unfortunately you need to buy new set

I WOULD GO FOR THE ECM AND CHECK WIRING

replace the coil pack, sounds like it is over heating.