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

hmmmm well i havent had this car very long maby a few weeks now and we are just trying to settel a few things with it and this seems to be the most anoying...i will give swapping the injectors and run up to advanced and have them read the codes but kinda hoping its not an injector because i dont have money to get one lol i have all ready ordered the O2 sensor cuz we had a theory it could be that plus i ordered the zzp supercharger coupler. but if it were a vac leak where is the most typical place to look for the leak?

Originally Posted by Spartanzz

if it were a vac leak where is the most typical place to look for the leak?

don't know what year the car is but there's a vacuum t under the SC snout that tends to split over time. it's part of a vacuum harness that goes from the bbv, fpr, under the snout over to the map. they're like $15 at the GM store.

the #3 misfire might be related but it also could be a plug or wire, something like that.

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?