2001 A6 2.8 Quattro
 

Any help out there After shutting down last week the fan continued to run on and when I went to start it afterwards it ran for a second (approx. 1100-1200 rpms) and immediately shut down after numerous attempts. Therefore I changed the Coolant Sensor(code related) , Fuel Pump and Filter, all 4 O2 sensors and Air Pump both sensors and pump were also code related.
No Luck
Any suggestions
running out of patience