Hey all, I need some help with my daily, its a 2000 Chevy cavalier 2.2 non-ecotec. Car is running rich, gave me a code p1137 so i bought both o2 sensors, changed the upstream o2 sensor, still running rich. I haven't gotten around to doing the downstream however from what i know the sensor is just a monitor. I found a leak after the cat so i wielded it up and yet the car still runs rich. I am stumped on what else it could be but hopefully tomorrow i will go through the exhaust system and check for any other leaks.

Any help will be greatly appreciated!
P.S car has a AEM cold air and cherrybomb glasspack( cut and clamped then wielded)

Iat hooked up? Since you have an intake sometimes it can get forgotten and will make you run rich

hooked up but had a little issue with the rubber on it, its mostly in, was too tight to fit all the way in. ill order a new rubber piece and see what happens