Recently acquired a 2000 A4, and it came with some problems. First off, the ABS light is on, Brake light is flashing and the Air Bag light randomly comes on.
It's currently pushing 20 psi, on a basically stock A4.

But the bigger problem it's have is sometimes when I'm accelerating, the power just suddenly stops. It seems like it's just bogging out, but all I need to do is take my foot off the gas for a second and the accelerate and it works fine...

What could be causing this?