[...] EFers. I have a 81 corolla 1.8 [...] in my stall (CAP CAR)baselined with high CO 2.2% 15&25 HCs elevated [...] O2 no fuel control,replace O2 verify fuel control pretests at approx 2% hcs about the same 175ppm with approx. 4% [...] intrusive test find no ... Login to read more.