my audi started making whistling sounds when it heats up all the way and i dont know where it is coming from, when i disconnect the vacuum hose from the brake booster while the car is running the squicking stops and when i pull out the dipstick the vacuum is really strong and pulls it back into the engine and when i try to open the oil cap on the engine it is almost impossible to open it and when you pull it off the engine with alot of force, it stalls

do anyone know why its doing that or what is wrong?
maybe some diagrams or pictures please

i found a video on youtube but it is a 1.8t and i dont know if its the same
Audi A4 1.8T with excessive vacuum running through breather system - YouTube

thanks alot ahead of time

 

Sounds like the PCV has failed. About $80 for one and easy to change.

 

thanks
is there any way to see where it is located and any way to test it?

 

If you have the 2.0T it is on the driver's side of the engine at the top. Looks like this:

Audi B7 A4 Quattro 2.0T > Search > Breather > ES#11561 ECS Breather Update Kit - 06F198206

 

Get this instead. Cheaper and bullet proof.

BSH 2.0T FSI PCV Revamp - BSH Speedshop

See sticky:

https://www.audiforums.com/forum/b7-...sticky-144534/

 

thanks a lot guys, i will try to get one today

 

I opened the oil cap while my engine was running last night and it sounded like it was about to stall so I quickly put it back on. Ordered my bsh pcv this morning. Hopefully it solves my problem too

 

 

On my car it fixed the issue.