Hi All,
Thanks in advance for any help you may be able to provide.
Car:
2009 CTS-V Manual 6
Mods: 9.55" lower Pulley, 160 deg t-stat, LT headers w/ no cats, NGK wideband, New Era Intake, dual Catch cans, ID850 injectors
I have the MAF and VE constants dialed in as I can run open loop pretty much bang on and all the injector data is taken right from the ID data.
I did do a bit of VE tuning after the below attached log because I collected more data running open loop on the way home.
I'm having a weird issue with the car going massively lean after driving in closed loop for about 30 mins. The reason I'm so confused is because the NBO2 sensors are going low voltage (indicating lean) and the WBO2 is going lean but the commanded lambda is 1.0. This means to me that the ECU is seeing a lean condition, commanding a Stoich fueling but it's not responding correctly.
I'm scratching my head why the closed loop works fine for 30 mins then starts to go haywire. Once this happens and I see it on the wideband I stop the car and load an open loop calibration and it runs perfect.
Here's the scan and it happens at frame 58056. https://www.dropbox.com/s/1itvyrla9q...p%292.hpl?dl=0
Here's my tune https://www.dropbox.com/s/t0e9879vno...02014.hpt?dl=0
Any help would be greatly appreciated.