OOO that O2 sensor

Hi all, have been reading a lot of your woes lately, :banghead: and with the "hard start when cold", and other "mixture too rich", etc., there seems to be the one thing almost never mentioned - the O2 sensors!!!!!!!!! Those little "overlooked" bougers can cause or be part of a lot of troubles. They are only good for about 50,000 - 100,000 miles then they start going south. You cann't see them easily, so they get overlooked. They do have an input to the computer to help with fuel mixture and the like. Might be worth checking out. Good Luck