NEED HELP tried almost everything!!
 

Guys I'm out of answers, I've been using the help on this site for a year now I just can't figure out what's wrong. My 8 has had power loss since I got it. It's like it's slipping but I got a new clutch system installed, with master and slave as well. Installed new ignition, cleaned e shaft, maf, throttle body, installed new cat, front o2 is new. I was almost positive the cat back was clogged but I did a back pressure test and it was perfect 0-.5 psi. I have a ticking under the car when clutch pedal in free play that came back after new slave and master cylinders. (Clutch fork?) I had the car checked by a pretty good mechanic he drove it hard and the car ran like a beast for three days and went back to how it was. I don't think it's compression, because I've NEVER had a hard start. Mt 104066m, I hope I can get some clues from fellow 8 owners. Thanks in advance

The only way to know if its compression related is to have a compression test done
and at 104,000 miles it would be a good idea to have it checked.
any idea on if its still the original engine or not?

True I will have it done in a couple days, and yes it's the original engine. But would it make sense for it to drive perfect for three days out of the blue? Like all of a sudden the engine sounded mean and everything felt different

So I just received a p0171 plus p2259

There's definitely a vacuum leak somewhere, and the AIR solenoid would be a good place to start looking.

P0171 - System too lean

P2259 - AIR solenoid valve control circuit low

Thanks for the replies guys I reset the ecu and p0171 was just there because I removed the sensor for a bit but p2259 came back I will check up on that.. i know about getting a compression test but can you guys see anything out of the ordinary in this freeze frame?

Freeze frame information:
------------------
Fuel Status = 0 byte
Engine Load = 23.529 %
Engine Coolant Temperature = 199.4 °F
Fuel Trim Bank 1 Short Term = 6.25 %
Fuel Trim Bank 1 Long Term = 0 %
Engine RPM = 2,585.75 rpm
Speed (OBD) = 19.263 mph
Timing Advance = 39.5 °
Intake Air Temperature = 89.6 °F
Mass Air Flow Rate = 12.91 g/s
Throttle Position(Manifold) = 16.078 %
Air Status = 0 byte
Fuel trim bank 1 sensor 2 = 0.781 %
Run time since engine start = 951 s
Fuel Level (From Engine ECU) = 14.902 %
Distance travelled since codes cleared = 2.485 miles
Barometric pressure (from vehicle) = 14.504 psi
Catalyst Temperature (Bank 1,Sensor 1) = 1,516.46 °F
Voltage (Control Module) = 13.965 V
Engine Load(Absolute) = 19.216 %
Commanded Equivalence Ratio(lambda) = 1.016
Relative Throttle Position = 4.314 %
Ambient air temp = 82.4 °F
Absolute Throttle Position B = 32.549 %
Accelerator PedalPosition D = 36.863 %
Accelerator PedalPosition E = 25.49 %

End of report.