I have a 91 4 door civic lx with a b16A swap in it. at first i wasn't able to go over 115 mph, but it didnt throw any codes then.but my distributor wires was grounding each other out so i re wired my distributor and now i can go over 115 but, my check engine light comes on and throws the O2 sensor. i dont have any plug in so thats why it comes on but i dont know how many it has 1 or 2 and where do they go.. thanks for any info on this