Thread: Can a bad O2 sensor cause a misfire code?

Ok so today I went and bought a can of carb cleaner and started spraying and for a hole in the vaccume line right above the sc. I sprayed there and the engine changed rpm. So what I did was repeat the pipe in the hose and tightened the clamp and sprayed it again. It didn't change rpm after that and I sprayed in more places but didn't hear change. I'm not 100% sure if I did it right so how would I know if the leak was fixed? And for the record its a 1997 grand prix gtp

Ok guys so i checked the T under the snout and the hose that connected it to the manifold was loose enough to basically pull off with no force so i got a clamp on that and i actually noticed the engine builds boost faster and it seems to have a bit more power. So now im gunna let the car warm up and stand near the exhaust and listen for the puffs of a misfire that i have. Is there any easier way to check for a misfire?