Hi All,
I'm at the point in my fuel map now that I'd like to turn the 02 sensors back on and make the final, smaller adjustments through the LTFT. I'm having some issues when turning these back on. I'm assuming it's one of the two things: The parameters in the calibration for turning the 02's back on is incorrect (I don't have my old N/A calibration to reference, I used a calibration from a 2009 Colorado 5.3 which is what I use for 02 sensors), I have bad sensor data (it looks like my 02 sensor signal goes from reading down to near 0, on both sensors, constantly).
The sensors I used are right at the end of my down pipe. The sensors are used denso 234-4337. They've been on the shelf for a couple years but they were used in this truck for a couple thousand miles and worked great when pulled to go turbo.
When driving with the attached calibration, the wideband AFR readout is going all over the place, backfiring when getting into the throttle etc. Something isn't happy. When I swap over to the same calibration with open loop, it runs good.
Last file is the reference stock 2009 calibration from the tune repository.
Please let me know your thoughts. Thanks!
Colorado_7875_VVE_2Bar_SEPpro1000cc_Rev5_ClosedLoop.hpt
LSColorado_e67_4bar_flex_SD_1000ProSeries_CL Attempt _04122024.hpl
1302962323.hpt