A4
2002.5
1.8t

Problem : The fuel mixture is too rich and causing my engine light to come on.
I already took to local shop and im getting an BXXXXX error code.
(ill post the code tom. when I find out)

There is alot of pressure coming out my gas tank when I refill. I have to wait 5 min or else the pump pops like its full.

I first noticed when my car randomly wouldnt let me go passed 4k RPM with a good warm up. it seemed like was being governed but i know thats not normal.

then later noticed that when I turn on my AC I couldnt go passed 4k at all in each gear.

lastly, my mechanic and i notice a hissing sound coming from the bushing of a thin AC pipe. ( the bushing has 2 pipes connected to it, and its on the back right corner of the engine.)

any ideas?

 

maybe its a boost leak. You get a cell flashing at your from time to time.

 

at your..... time to time? ?

the thing that flashes is my check engine light and it turns off. or it stays on for a minute.

and turbo leaks cause a messed up fuel mixture?

Im gettin a friend VAC test it, is that the way to start eliminating culprits?