go get pblaster, wd 40 or lubercating oil of some sort... I used a big cresent wrench and some thick gloves cuz your gonna have to put your bak in to it to twist it off!! sounds like a knuckle smasher to me! good luck! on a 92 their should only be one 0s sensor located on the downpipe on a duel or single cam motor. Install is no brainer plug it up and screw it in!!