I have just bought a lovely example of a 1998 A4 1.8 Avant Auto, with lots of extras to the SE Spec. Full Audi service history, 60k miles. Really happy with the car except for a couple of questions that dont seem to be answered by the owner's handbook:
- Sometimes the Radio/CD/Tape cuts off and a loud beeping starts coming through the car audio system beeping once a second getting louder and louder. The only way to stop it is to turn off the Audio system. The car is fitted with the top-spec Audi+BOSE system if that makes a difference.
- After driving for a while, taking foot off of the accelerator, the engine idles very roughly. Moving gear lever from D to N makes no difference. Revving the engine (in N, of course) for a few seconds lets it settle down and idle properly. My VW Golf used to do this as well and could never figure out why. Any Audi experts seen this before?
- Fuel economy seems to be about 30mpg according to the computer. Measuring miles and litres of fuel at the pump indicates about 28mpg. Is this about normal for this vehicle?
- Have seen various mods advertised that fool the ECU into thinking the air from the air intake is cold, supposedly giving +10BHP improvement. Anyone had experiance of these mods? Is 10BHP Noticable? Do they damage the engine/cat?
Many Thanks
Andy