Having a sputtering problem under normal driving. In all gears I take off and it runs like crap. My A/F guage shows its pegged out over 18. But at WOT it runs great and A/F goes down to 11.3 ish. I recently put new plugs in, and I changed o2 sensors. Was throwing a code but I cleared it and it hasn't came back and seems its getting worse. It just started idling bad too. Almost died then goes to a normal idle and A/F