Ok, well that's definitely a relief. I'm sorry to be asking such beginner questions, but I'm finding it hard to pin point which reading and the range of said reading I should be looking at. I know the O2 sensors will give me a voltage output but I'm not sure how to get the AF ratio from that. Also, From what I've read the main chart I should be tooling around with is the Vlumetric efficiency vs rpm vs map chart correct?