Hey guys, got a Audi RS4 and been reading about the 2.7 biturbo issues, mainly the turbos starting to go.

lately noticed a few small things — slight loss of boost, feels a bit flat sometimes, and once or twice a kinda uneven idle. no crazy smoke or loud whining yet tho.

could this be early turbo problems or something else common on these? where would you start checking first? trying to catch it before it turns into a big job 😅

8 hours ago, Arnob80 said:

Hey guys, got a Audi RS4 and been reading about the 2.7 biturbo issues, mainly the turbos starting to go.

lately noticed a few small things — slight loss of boost, feels a bit flat sometimes, and once or twice a kinda uneven idle. no crazy smoke or loud whining yet tho.

could this be early turbo problems or something else common on these? where would you start checking first? trying to catch it before it turns into a big job 😅

Hi you could start by taking off the intake pipes to the turbos and check the intake impeller for float and movement side to side, anything up to a millimetre is not to bad, floppy definitely is not. If you have no excessive movement try a can of spray down the intake turbo cleaner.

Steve.

Thanks for advice will look into compressor impeller and post an update