PLEASE CAN SOMEONE GIVE ME SOME ADVICE,I HAVE A 2000 A6 2.7T THAT IS RUNNING VERY POORLY SHE WILL ONLY REV TO ABOUT 3000 AND THATS IT.TOOK IT INTO THE GARAGE AND HOOKED IT UP TO THE COMPUTER IT SAID FAULT ON PLUG 4 SO CHANGED ALL PLUGS AND STILL THE SAME SO SWAPPED COIL PACK OFF NO3 AND FAULT CAME UP ON NUMBERS 3 AND 4 SO PUT NEW COIL PACK ON AND STILL THE SAME PROBLEM ON NUMBER 4 BUT RUNNING EVER SO SLIGHTLY BETTER IF ANYONE HAS ANY IDEAS THEY WOULD BE MUCH APPRECIATED.