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bad o2 sensors=power loss?

This is a discussion on bad o2 sensors=power loss? within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by YoMommasTA thing is alot of 02 sensors get replaced without ever being tested and are STILL GOOD.bad ...

  1. #41
    Space Cadet RainMan's Avatar
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    Quote Originally Posted by YoMommasTA
    thing is alot of 02 sensors get replaced without ever being tested and are STILL GOOD.bad plugs ign wires etc can foul them quickly.sure they can look and act bad but if they are being fouled constantly by something else you will chase your tail and get extremely aggravated.the symptoms the other person posted that i said BS to looked like something someone read out of a book.i deal in the real world.
    Makes sense about the potential mis-diagnosis for Bad 02's. However without further investigation or questions, how do we know what her rational is or whether she was basing off of actual experience or a book? Suddenly throwing the B/S flag without explaining why you disagree is gonna step on nerves!
    We all could have handled this thread a lot better than we did!

    Food for thought.
    Last edited by RainMan; 02-15-2006 at 06:44 PM. Reason: Oops, Gender Fopa

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    while i'm at it one more thing that can foul 02's is running a cold thermosate.if the engine doesn't get hot enough the exhaust won't be hot enough either.this will kill-foul the 02's also.i hope this helps you sovle your 02 troubles.sorry if i pissed anyone off,i didn't mean too.

  3. #43
    Impounded YoMommasTA's Avatar
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    seriously 02's last a VERY VERY long time.i've seen them with 150k and still bench test fine.

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    Space Cadet RainMan's Avatar
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    Quote Originally Posted by YoMommasTA
    while i'm at it one more thing that can foul 02's is running a cold thermosate.if the engine doesn't get hot enough the exhaust won't be hot enough either.this will kill-foul the 02's also.i hope this helps you sovle your 02 troubles.sorry if i pissed anyone off,i didn't mean too.
    It's Cool! Thanx for the info!

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    Senior Member 02z28ls1's Avatar
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    Now that's some useful information -thanks. Back in the day the method I was talking about and trying to remember involved grounding an underhood test lead which would throw the engine lean-increasing exhaust temp.,burning off any contaminates.Doing the same thing as a torch method but without the hassle of removal. Doubtful that info actually helps anybody anymore but thought I would throw it out there to close that thought.We would do this as preventative maintenance if we had the time and inclination. Again thanks for the info Yomamma. Update-woke up this morning remembering this useless bit of trivia-it was the O2 sensor lead.Grounding this out would fool the computer into thinking the engine was too rich.The OBDII engines are too sophisticated for this to work -however if anybody has an older car out there and wants to try a simple tune-up procedure w/o the hassle of removing the 02 sensor,give it a whirl.Let the engine warm up and idle-with a one wire 02 sensor obviously you can't get it wrong-ground out the sensor lead.You can do this for as long as you'd like w/o harming the engine(while it's idling).It will clean the 02 sensors just like the torch method.Again this will not work on the newer cars -just the one wire 02 sensor types.
    Last edited by 02z28ls1; 02-16-2006 at 05:00 AM.

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    Quote Originally Posted by RainMan
    Are the Vette 02 sensors WideBand??
    No. You'll have to buy a wideband from a speed shop and whatnot. They are used for tuning.

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    Member adham's Avatar
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    ok, so where do i get my o2 sensors replacement parts?
    i was told to stay away from BOSCHE

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    My o2 sensors are Bosch. I've never had a problem with them. Ive put roughly 20k miles on them.

    You can get o2 sensors at the dealer or any parts store.

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    i've used bosch without any troubles.if you have ANY mods that changed the engine exhaust like headers,thermosate,A I R removed,or egr removed i would NOT use the stock 02's.they won't be happy.

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    Member adham's Avatar
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    i just got new headers
    i guess i will go with BOSCH
    they are $67 each
    thanks for everyone's input

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    Impounded YoMommasTA's Avatar
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    i wouldn't do that if i were you.

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    Why? I don't see a problem with it.

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    there is a better 02 for use with headers.same one used on the corvettes

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    Like I said...ive been running the Bosch o2 sensor off a vette for 20k miles and havent had a problem. Im even untuned...

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    i misunderstood,yep thats the one i would use too,do you have a part number or app year?

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    I think the year is 2002...although Im not 100% positive. Its been awhile. Part # is 13111

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    yep, those are the ones im getting
    by the way, what does it mean when the car is surging???

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    we are talking front o2's right? what is the difference with the vette o2?

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    A surge is when you are in a steady state throttle (holding pedal steady on level ground) and the engine wants to hunt the speed up and down-surge up and down. If you ever drive something that is doing this it's really noticeable.

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    Technically speaking, the O2s should have no impact on power at WOT because the ECM goes into open loop. It will kill driveability, fuel economy, etc below WOT(closed loop), but at WOT, the ECM does not use the information from the O2 sensor. Atleast that has been the case for many years.

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