Have a 03 A6 3.0 Avant... on occasion and it seems this only does this when the tank goes below 1/4 I have idle/surge issues. It acts like the ICV is not functioning and will surge back and forth between 200 and 1200. After a bit of the surging my ESP light will come on and the tranny will shift harder than normal and will "clunk" from Park to Drive... Now that I have noticed the gas level connection, I will fill the tank after this happens and drive on the highway for a bit and it all clears up and functions normally after maybe 10-15 miles. I had a coil go bad a while back and at first I thought this may be the case, but it's not acting like the other one that went bad. What is also interesting is that all this started when I put new tires on the car about a month ago. The tires were just a touch bigger.. From 215/55R-16 to 215/60R-16. Any input would be great... thanks!!


Oh and it seems my power steering is real noisy when it's colder out. Is this normal or is the pump getting weak?