O2 sensors keep dieing, need help?
O2 sensors keep dieing, need help? I have a 2000 ss with longtubes and true duals. When the factory o2 's went out I replaced them with some denso o2's and everything was fine for roughly 10,000 miles or so and they went bad. Replaced them and after that the car started going through o2 sensors. I have had the car retuned and it didn't help. I thought the part store sensors were junk so I tried gm and that didn't help any. Right now I can replace the sensors, clear the code and within 40 miles or so the light comes on and it throws the codes for the o2 sensors. The original o2's lasted awhile after the mods. i am totally lost on where to begin. I've been told to check my grounds so I'm going to try that. Any insite would be greatly apperciated. Besides the grounds i have know idea where to start. The car does have a cam and some head work and the last tune was done by a reputable shop. Please help.
Maybe, try the correct forum?/ Most likely to get more responses..
https://ls1tech.com/forums/advanced-...e-posting.html
https://ls1tech.com/forums/advanced-...e-posting.html
reason i ask is cuz i have been through this before, off road pipes and still running 02's that is, see your 02's hafta get up to around 600 degrees before they start generating voltage and without the cat there for some hold up the heat was going right past the sensors and not getting them warm enough, we let the car idle for half an hour and shot the pipes with a heat gun and they were only around 400 degrees. anyways it is possible for the exhaust to run too cool this is why alot of people delete 02 sensors with off road exhaust. you could try pulling the sensor out and looking at them if there is alot of black on them then your prolly runnin tooo cool down there, and if it interests you, you could also put the sensors in a vise or hold them with vise grips or what not and hold a torch on the business end and hook a multi meter onto the wires and watch for voltage, 450 mV is what you are looking for you will go up and down around that voltage as you heat and cool the sensor with the torch and dont be afraid to get it red hot a little it wont hurt it and you should also see the black crap come off the sensor should there be any on there. just an idea not sayin i guarantee this is your problem but it was mine and would up learnin sumthin cool onhow to test them in the process, scanners work also to test them but a torch is much cheaper and who doesn like playin with fire
Are these pre or post cat sensors? Do you have cat's?
With longtubes your best bet is to delete the rears anyways. Also look for any exhaust leaks. My exhaust y-pipe uses band clamps and they sometimes leak a little. Any leak like that could promote insufficient switching and throw a SES light. Like you said check/clean your grounds too. I replace mine every few years, but I only use AC Delco's.
With longtubes your best bet is to delete the rears anyways. Also look for any exhaust leaks. My exhaust y-pipe uses band clamps and they sometimes leak a little. Any leak like that could promote insufficient switching and throw a SES light. Like you said check/clean your grounds too. I replace mine every few years, but I only use AC Delco's.
the rear o2 sensors are only there for catalytic converter performance. if it is the rear o2 sensors that keep going on you, just rip them out buy some o2 simulators or get the pcm tuned. and your problem is solved.
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Verdad Gallardo reason i ask is cuz i have been through this before, off road pipes and still running 02's that is, see your 02's hafta get up to around 600 degrees before they start generating voltage and without the cat there for some hold up the heat was going right past the sensors and not getting them warm enough, we let the car idle for half an hour and shot the pipes with a heat gun and they were only around 400 degrees. anyways it is possible for the exhaust to run too cool this is why alot of people delete 02 sensors with off road exhaust. you could try pulling the sensor out and looking at them if there is alot of black on them then your prolly runnin tooo cool down there, and if it interests you, you could also put the sensors in a vise or hold them with vise grips or what not and hold a torch on the business end and hook a multi meter onto the wires and watch for voltage, 450 mV is what you are looking for you will go up and down around that voltage as you heat and cool the sensor with the torch and dont be afraid to get it red hot a little it wont hurt it and you should also see the black crap come off the sensor should there be any on there. just an idea not sayin i guarantee this is your problem but it was mine and would up learnin sumthin cool onhow to test them in the process, scanners work also to test them but a torch is much cheaper and who doesn like playin with fire
Are these pre or post cat sensors? Do you have cat's?
With longtubes your best bet is to delete the rears anyways. Also look for any exhaust leaks. My exhaust y-pipe uses band clamps and they sometimes leak a little. Any leak like that could promote insufficient switching and throw a SES light. Like you said check/clean your grounds too. I replace mine every few years, but I only use AC Delco's.
With longtubes your best bet is to delete the rears anyways. Also look for any exhaust leaks. My exhaust y-pipe uses band clamps and they sometimes leak a little. Any leak like that could promote insufficient switching and throw a SES light. Like you said check/clean your grounds too. I replace mine every few years, but I only use AC Delco's.
I believe I have along with factory and it didn't help.
