i think my O2 sensor is bad on my 93 lude h23 i was gonna get one from napa for 100$$ at my cost but thats too much for not knowing whats really wrong. what other cars have the same O2 sensor so i can just try one i know works befor i waist 100$$ could any one help me out thanks

 

why do you think your O2 is bad?
are you throwing the CEL?