Sweet71

iTrader: (10)

I had the tune in my car pretty sorted out, was runnin right around 14.5-14.7 at cruise then all of a sudden yesterday the AF at cruise was right around 10.5-11.2 and just stayed there, at wide open its goin off the chart fat where it use to sit around 11.2-11.5 any ideas or suggestions? Thing was runnin awesome and was havin no issues till yesterday and havent changed anythying. Thanks for any help

2xLS1

iTrader: (25)

Sounds like it was running in closed loop and now it's not. But with the limited abount of details you give about the car or the type of tune that is in it who would know or even care.

MCBRIZ28

iTrader: (2)

Wide band need calibrated or bad wideband o2 just a couple of thoughts

shoemike

iTrader: (25)

Is it noticeable while driving?
Missing, bogging ect.

If not the sensor may need to be calibrated or replaced.

Sweet71

iTrader: (10)

Car was in open loop tune is a 3 bar sd tune through hp tuners. Thanks for the smart *** reply. When the wide band goes fat the car bogs quite bad

2xLS1

iTrader: (25)

Smart ***, no. Truth, yes. How in the hell is anyone supposed to help or know what the hell you are doing with your first post. Just like 90% of the posts here asking for help with no details at all. Most don't even say what kind of car it is they are asking about. Did you? Did you give any details about the car or tune? Like everyone here was supposed to know thay you have a 3 bar open loop SD tune. Yea, that is so common to run on these. Good luck fixing your problem.

Higgs Boson

iTrader: (3)

Sounds like too much fuel for the amount of air that is going through the engine.

BLK02WS6

iTrader: (2)

Is the coolant temperature logging correct? If the sensor fails, it will throw it way rich...

Sweet71

iTrader: (10)

Coolant and IAT's are reading correctly

BLK02WS6

iTrader: (2)

What about the MAP? That's the only other sensor you have online that could do it...