Hello
About a month ago I purchesed an 06 SS, 2.0L Supercharged.

After buying it, it ran rich... P0172 Code...
Dealership (Still under warrenty) said
Oh your KN Air Filter is causeing the problem! And it voids the warrenty.
After contacting K&N They informed me that this would not cause the problem. My Mechanic training also agrees with K&N. K&N Also informed me that voiding the warrenty baised on a brand name is Illegal. Ok So they CAN void a warrenty based on Style of intake. So to keep my warrenty good I opted to let them switch me back to stock intake.....
But then...

They descided that my ECM was reprogramed! Why didnt they figure that out at first? Well of course they didnt. So now they Tell me my undersized pully could be a problem too. They tried to convince me to have the ECM replaced, but when I braught up, "If it can be reprogramed after stock, it can be reprogramed to stock" So they went and reprogramed it back. Suprisingly it acually runs BETTER now. Im sure the reprograming helped, and the Air Intake didnt change anything. I Plan on switching back to K&N and keeping both on hand so I can swap it out if i need to take it in. Might do the same for the Belt/Pully, but thats a little more work. ALSO my STOCK intake is a very Similar Style to the K&N. Enough so where I do think they were violating federal law by telling me that my Intake voided the warrenty.

Well I hope my undersized pully and stock ECM program don't cause me any issues... The Pully is a ZZ Performance at 2.85" Not sure what the stock size is.
Im hopeing that the reprograming will clear up my 30% fuel economy error as well as my P0172 fault. I know the AirFilter replacment didn't fix anything.
-Jonathan

 

Does the car have stock sized injectors in it? If you run the stock 34 lb injectors with a 2.85 pulley the motor is gunna be pissed .

If you had upgraded 42 lb injectors....and are now on the stock ECU calibration .....your going to have problems with that set up as well. Either way your screwed so look at the injectors and see what color they are. THEN maybe........ we can get it straightened out before the motors junk.

 

listen to this guy. You have a lot to figure out and need to do it fast before its to late

 

If the car had that size pulley on it the injectors would be atleast 42's (shoud be) ... as far as running better now that they flashed it back to stock thats really odd.

 

Should of at least reflashed it with the stage 2 instead of stock.
They must of or I think you would be having issues.

 

You definately need to figure out what is in that car. I bet someone parted out a bunch of parts but left their tune on the car when they sold it. If they put their stock injectors in but were tuned for 60# or 42# injectors that would definately cause a problem.

 

2.85 on stock tune? Be very careful man, stock is 3.34 i believe and depending what injectors are in your car you could be in trouble. I wouldn't push your car into boost at all until you get this straightened out.

 

Wow Ive learned so much about my car and cars in general from reading posts on this sight, my own research and experiance. I think I've come a long way now that I look back.