Hi, I haven't post in sometime due to the damn virus. I finally took the car out about a month ago and she drove fine for several trips. Last month while merging into traffic on the interstate the car lost power and the Check Engine Light came on. There are 4 codes all pointing to issues with the upstream O2 sensor. Changing the sensor didn't solve the issue. This is an intermittent issue and the car does not enter limp mode. It will stumble then catch and act normally. Has anyone had an issue like this? My tuner said it might indicate an exhaust leak but that has been ruled out. He is booked up until December and I need to get this fixed now! If you have an idea what I should look for or know of a tuner in Indiana that has a dyno please send me the info. I've called several tuners and they say they do not work on the Ecotec platform. I usually work with Dave at PerformanceAutoWerks in the Chicago area.
Thank you for your time.