Oxygen sensors keep going bad???
Thread Starter
Teching In
Joined: Oct 2005
Posts: 42
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Oxygen sensors keep going bad??? hey everyone, seems like since i have replaced the exhaust manifolds with headers my O2's keep going bad, i have replaced each side twice which is 4 senors in the last 2 months, getting kinda of expensive. Is there any reasons for this, also have replaced the spark plugs twice. If anybody could help me out or have any ideas please let me know. Thanks
TECH Resident
Joined: Oct 2005
Posts: 781
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From: Taxme, Ohio
The ceramic coating on your pacesetters will initially damage O2 sensors. It is recommended to either plug the sensor holes or use old sensors for a while. Obviously you will get a DTC while the O2 sensors are out and/or disconnected with the first option. The good news is the problem should go away after a while because the ceramic inside the headers apparently doesn't out-gas for long. Disclaimer: I am just repeating what I have read from other posts regarding this problem.
If you're replacing them based on heater codes, that's
just bitching; don't encourage it.
If you are seeing
real low-RPM, low-throttle mixture problems from it
then that's another story.
Look at modifying the present set as I've seen here
recently, opening up the slots in the sensor to let
more gas through and gain heat in the element.
Also consider wrapping the lower part of the header,
the collector at least, for a little more help. Too much
surface area cooling the gas, not enough gas heat and
not enough heater power.
just bitching; don't encourage it.
If you are seeingreal low-RPM, low-throttle mixture problems from it
then that's another story.
Look at modifying the present set as I've seen here
recently, opening up the slots in the sensor to let
more gas through and gain heat in the element.
Also consider wrapping the lower part of the header,
the collector at least, for a little more help. Too much
surface area cooling the gas, not enough gas heat and
not enough heater power.
Did you use extensions or did you make your own? That y pipe banging makes the knock sensor go crazy. I got tired of it and bought td's. Made the extensions and have had no problems. As long as the connections are tight and heat shrinked there should not be a problem.
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Thread Starter
Teching In
Joined: Oct 2005
Posts: 42
Likes: 0
Yeah, I made my own extensions and did heat shrink them, but after replacing them every other week its a pain in the *** to keep doing it so my extensions from summit should be here by tomorrow, i'll see about fixing the y-pipe and hopefully I won't keep having this problem. Thanks everyone
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Originally Posted by jimmyblue
If you're replacing them based on heater codes, that's
just bitching; don't encourage it. If you are seeing
real low-RPM, low-throttle mixture problems from it
then that's another story.
Look at modifying the present set as I've seen here
recently, opening up the slots in the sensor to let
more gas through and gain heat in the element.
Also consider wrapping the lower part of the header,
the collector at least, for a little more help. Too much
surface area cooling the gas, not enough gas heat and
not enough heater power.
just bitching; don't encourage it.
If you are seeingreal low-RPM, low-throttle mixture problems from it
then that's another story.
Look at modifying the present set as I've seen here
recently, opening up the slots in the sensor to let
more gas through and gain heat in the element.
Also consider wrapping the lower part of the header,
the collector at least, for a little more help. Too much
surface area cooling the gas, not enough gas heat and
not enough heater power.
