AudiWorld Forums - New Audi Owner. 02 A4 1.8t issues.

First off I want to go ahead and apologize if the answers to my problems have already been dealt with in other threads. However my situation is a whole host of things and I figured I would lump everything in together and hopefully get some useful help without wasting many hours or money on something that isn't causing the problems.

CEL is on so I ran the codes and here they are.

-P0300
-P0301
-P0302
-P0303
-P1127 Bank 1 mix adaptation: too rich
-P0420 Catalyst system bank 1: efficiency below threshold
-P0328 knock sensor 1 circuit bank 1 G61 high
-Speed sensor rear left G46

The vehicle now has 206k miles on it.

I have recently (within the last two weeks) replaced all my coils, plugs, air filter and all four fuel injectors. When I first bought the car at 198k miles, I replaced the fuel filter. After doing so I cleared the codes and ran it a couple days, however everything you see above came back. For a while now, in the mornings when I try to start the car it doesn't kick over the first time. But on the second try, every time, it'll turn over. Once the car has been running for a bit, killing the engine and then turning it back on is no problem. As of right now after its been running a minute you can start to feel the missing of the engine. It's not very violent but still noticeable. A very light pulsing in the idle. The vehicle also hesitates a bit when I put the pedal to the floor. It rattles a bit then revs up, but you can feel a loss of power as well. On top of all this, I don't hear my turbo anymore.

This is just a short summary. Again I apologize but I just wanted to start this thread and hope to get some help. This is my only car and if this thing goes down, I'm pretty much screwed for work as I drive a lot.

Any help would be greatly appreciated!!!