turbo2001

some help please your opinion is needed, my tuner just completed a ve tune on my h/c/I/E 05 c6. the car ran great for about 1 week of steady driving no issue's or code's. a/f was right on time 12-7 / 13-2 wot idle was at 14-5. today I started it and idle after fuel trim's kicked in at 132 degrees a/f was at 10-5 and 10 under exceleration. idle was at 12-5 13-5. just got off the phone with my tuner he said it not in the tune most likely a wire or o2 going out. what you think thank's joe.

0foff667

Sounds mechanical to me as well.

turbo2001

yea i was afraid of that, don't know where to begin no code's thanks for your input man.

Mez

I assume you have HP Tuners scan running if you are getting these numbers and have a WB02 installed.

Check all the connectors including MAF and O2.

Did you recently get a tank full of ethanol?

turbo2001

hey mez, no no ethanol but I will go over the car tommorow and check all the wireing thank you joe

turbo2001

and yes i do have a w/b installed