04 audi a6 2.7t rough idle
 

I have recently cleaned my throttle becuase the idle was running a little off. i reset the idle using vag-com and it works after a few miles but then goes back to a really bad idle. it feels like the car is about to shut-off. I also tried raising the idle to 1000rpm instead of the stock 850rpm but i keep getting an error. i cant even raise it a little. i also keep getting random missfire codes after a few days. but the car isnt miss firing at all. can anyone give me suggestions on what i shoud do to solve this issue or an idea of what is cuasing it.

Your ignition control module(s) could be on their way out. Are you only seeing misfire codes from one side of the engine and not the other?

I looks like it only misfires on bank one but its not always it just misfire after like 10miles after i adapt the idle using vag com. I also try raising the idle but it gets me an error.

Try swapping your ICMs (They are found right around the air box on the 2.7T). If the errors go to bank 2, you have found your problem.

This is a very common thing that we've seen numerous times on these forums. You'd be surprised what kind of weird errors a bad ICM could cause.

Give it a shot. Try switching the ICMs around and see what happens.

I am not really sure what the icm looks like. Can you please send me a picture or a link to a picture so i know what im looking for.

I cleaned my throttle body becuase it was idling a lilttle rough. And when i put it back together it idles even worse. I sis the tb alignment via vag com but it still isnt stable. I also tried to raise the idle but it gives me an error. Can someone please help

When you had your throttle body off, did you see any rips in the boot?

Also, this is what an ICM looks like.

No i didnt see any vacuum leaks i also got the car fog tested. There arent any leaks at all.

Im at work right now but tomorrow i am off and i will post a full code diagnostic from my car to give you guys a better understanding.

This is my codes i pulled after taking the battery off and put it back

P1118 b1 s2 open circuit
P1114 b1 s2 internal resistance too high
P0150 b2 s1 malfunction in circuit

I changed b1 sensor 2 already but i have a mechanic that said he can chip the ecu and delete the rear 02 sensors and i am gonna buy a new 02 for b2 s1 but i still have to figure out why my car is idleling very bad since i cleaned my throttlebody. I dont get the code right away but it sometimes says throttlebody is malfuctioning or not aligned even though i align it all the time with vag com but after like 10 miles it goes back to bad idle and is never steady.