I have been working on this one since I installed the Headers and IC a year ago. When the car is warm sometimes at low rpms (idle, reverse, stop lights) it starts pulling 10 AFR +16 ltft and my o2 stops switching stays at about 1035 and stalls unless I hold my foot on the gas. The tune is overkill and the rear o2 has been deleted along with the cat testing.
My o2 is in the SD headers by the firewall. I tried it in the u bend with no luck as well. This is like the 3rd o2 Im on all ac delco oem. More details about the car in my signature. Any thoughts or ideas is very appreciated. Going nuts over this.
