First time on here bare with me guys, I've got a 1994 toyota pickup with a 22re about 30,000 miles on rebuilt motor, code throws for ait fuel mixture it's got a new egr, o2, and pcv if makes a difference. I also have an obx racing header with extention tube where the o2 goes in it, no cat just muffler. I am losing oil but don't see a leak or smoke if burning it so if anyone can help please do thanks.