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2005.5 A4 Avant 2.0T Engine Sounding Like a Diesel?

Hello All,

Been a while since posting here but I just received my new 2005.5 A4 Avant I purchased off eBay (5th now lol) and it is immaculate minus the engine idling and sounding really rough. I ran my VAG without any issues found but while running if I take the oil cap or dip stick off/out a ton of air sucks into the engine making it almost quit. Would one assume that this is a dead PCV valve or perhaps a vacuum leak elsewhere? The diesel noise does just sound like a ton of air sucking into the engine essentially but I cannot seem to map out where it is coming from. Any help would be much appreciated! Cheers :)

Re: 2005.5 A4 Avant 2.0T Engine Sounding Like a Diesel?

It's normal. It's the FSI that makes that sound.

Re: 2005.5 A4 Avant 2.0T Engine Sounding Like a Diesel?

Ah of course! Direct Injection & high compression...doy! You think they could have done something to mellow it out tho lol.