Diagnosed with oxygen sensor problems, and waiting to get the replacement parts sent to me to Asia where I work. I the meantime I have disconnected the upstream sensor, just to find, that my 97 Cherokee 4.0/L6 runs actually very well without the sensor. I could not tell any difference, and it does not look like the gasoline consumption is going up.
My question is now: Does one need both sensors, or is it just because of emission laws in America, that they are required. I mean, do I really need them here in Asia, or can I just drive without them, and not risk any engine damage?