cpetersohn

Hello,
2016 Audi A3 2.0T, the car will occasionally start fine, but 75% of the time the starter will continue to turn and turn until you press the throttle and very roughly it will go to idle where it will continue to shake and what I assume sounds like misfires. (not sure) Now it will even jerk when going down the highway and accelerating at higher speeds. Now I have changed a few things chasing this problem and try to not judge my train of thought cause I have no idea what I'm doing and change parts before I ask questions.

First here are the codes:

P130A00 - Hide Cylinder
P050600 - Idle Control System Rpm Lower than expected
P225100 - O2 Sensor negative current control circuit bank 1 sensor 1, open
P044100 - EVAP emission control system incorrect purge flow
P030100 - cy 1 misfire
P030400 - cy 4 misfire
P030200 - cy 2 misfire
P030000 - misfires
P017200 - Fuel trim bank 1 system too rich
P218800 - System too rich at idle, bank 1

So, I started by changing the spark plugs, in which there was no change. Then I tested the coil packs (did not replace), they were all giving spark immediately after start button. Then I changed the throttle body and did throttle adaptation. No change. I changed my brakes, not related but I did it. Moving on. Then I changed the upper o2 sensor. I think it got worse. I bought the lower o2 sensor. Got afraid to put it in. So before I buy another unnecessary part I figured I would come ask the guys that actually know what they're doing. Now This could be just because I haven't given it enough time but the 02 sensor codes, throttle, and idle codes haven't reappeared since the replacements. But, now that it's been losing power on highways I haven't been driving it a lot. Mostly misfires and rich fuel, Which I always figured was because of misfires so never thought much about. Hoping I'm wrong and you guys can just tell me how many mistakes I've made. Cheers everyone and thanks in advance.