How to check for a bad 02 sensor? I'm running rich

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yeah you would think, sometimes cars are funky, polus its pre 95 so you never know. maybe the bulb for the light is shot? lol. are you SURE its rich? or do you just have a modded rather open exhaust pushing alot of carbon?

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um… yeah it’s one of those diy manifolds actually. It’s louder than poop, I just welded in a new muffler with no luck, now I have to find some time to see if the cat was punched. Either way the manifold has rinky dink pipes, so I don’t know. Yes, there is carbon build up as well, but what I’m smelling is good old gasoline, very prominently actually. Who knows, I haven’t had to take care of this issue before, but I’d like to do something about it.