Alright so recently ive been getting trouble codes PO133 and PO153. Those are the front O2 sensors slow response left and right banks. Right now ive got delphis, ive had them for about 8,000 miles. I dont know why they went bad but i need to replace them with something that last a little bit longer. I can get AC Delco, Bosch, Delphi, or Borg Warner. What would you guys recomend. Ill probably go with AC Delcos since the stockers lasted almost 70,000 miles and they only went bad after i put on my longtubes.

 

Ac Delcos

 

AC Delco's

 

Delphis, which are the AC Delcos.
My Bosches crapped out in less than a year, nuff said.

 

If you put new O2s on with your new headers, that's probably what did it. A lot of people report O2 failure after new headers, seemingly because the O2s get fouled by the curing of the header coatings and and production oils. For this reason, it is generally recommended that you wait to install new O2s until the headers have cured.

 

No, the new headers ruined my stock O2 sensors, as i knew they would so i waited a few hundred miles and replaced them with the delphis. But does anybody know why my curreny ones would die this soon?

 

i got the borg warners, does anyone know if there any bad?

 

AC Delcos here.

 

doesnt NGK make o2 sensors ?? if they do , go with them.

 

The common contaminants for the sensors are lead, anti-freeze and silicone. Dex-Cool is supposed to be O2 sensor friendly. RTV compounds often contain silicone, unless marked "sensor safe". Generally not a good idea to put anything on the threads, such as anti-sieze. The sensors come with a conductive anti-sieze already on them.

Its also possible that the outside of the sensor can be contaminated with oil, dirt or other materials, preventing the exposure of the outside of the sensor "thimble" to ambient air. The thimble generates the voltage based on the difference in O2 content between the exhuast on the inside of the thimble and ambient air on th outside.

Denso makes a "lead tolerant" O2 sensor that is supposed to withstand twice the exposure to lead, compared to standard sensors.

Here's a link showing photos of different kinds of contamination:

http://www.walkerproducts.com/Common...onditions.html

 

I just bought two AC Delco sensors, and on the bag it says that if the sensor is removed for inspection, apply a fresh coat of anti-seize compound (Goodwrench part number 12377953 or AC Delco 10-102) to the threads before installing.

Is this some special sensor-safe compound that's different than typical anti-seize?

 

Denso lead tolerant sensor.....loves the leaded gas

 

I also went with the Denso Lead-Tolerant O2 sensors as I plan on running Leaded AV100 (around 115 R+M/2 pump octane) fuel for the track. (only $3.40/gal which is much cheaper than $4.50-$5/gal Torco or Turbo Blue 110 race gas)
I got mine for like $38/each from sparkplugs.com.
You must order Corvette sensors however as they no longer list the part number as being used on the Z28 for some idiotic reason.

 

thats where I got mine too..... sparkplugs.com ..they ship fast and its cheap

 

So can these leaded O2 sensors be used in every day non-leaded cars? If so how long do they last?