i am having some rather odd problems with my b6 sport avant and wondered if anyone had the same issues or knew what was wrong, first of all the car has full service history, has been scanned on vagcom with no errors so assume its mechanical failure. In the last 6mths the engine has been making an extremely weird rattle noise from the engine bay, Audi said this was the aircon pump and wanted ridiculous amount to change, the noise is only really apparent if you run the car with the econ light illuminated, with the aircon running the noise is still there but very muted! But in the last week its been acting very odd, the car fails to start first pretty much every morning, starts for a split second then cuts out, and car has started to feel like its got a 1.0l engine and is towing a trailer, I do around 100 miles a day in the car and its been getting worse, no smoke from exhaust or anything like that, however the other day (and this is the weird bit) I noticed by pushing the econ button so was illuminated made the car run like it had been kicked in the backside, it would start in the morning etc, the other weird thing is with the econ light on now the engine won't get to temperature, it runs cold, switch econ light off again and it runs to temperature and stays there no matter what!! Also with econ light on I get the terrible rattle noise! I have been told I can change the belt for a smaller belt to bypass aircon pump for the moment but don't have a clue what belt I should buy??
The car has a revo remap on it and like I say runs fine with econ light on (apart from cold running issue and rattle) and runs like a bag with the light off and feels really bogged down
i don't have much money (just moved house) so would like to attempt to fix by myself instead of a garage
Any help appreciated before I decide to set the car alight!!!