I have a High Flow Converter on my car and the MIL came on. I know the reason it came on is that I intsalled the converter. I was wondering if my car will get messed up by driving with it like that? I know that if I don't get it fixed then I will not know if the MIL comes on for any other reason. I was wondering if and O2 Simulator is worth $50?

http://userwww.sfsu.edu/~ecg/o2sim.htm