Oxygen sensor choices and quality.

Hmong_1G

Hmong_1G

Name the Place and time.
Dec 31, 2008
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California
Alright after doing a few test, I have found my Factory 02 sensor is not in TSRM specs of resistence. Looks like I need to replace it. Im skeptical on Bosch 02 sensors. I have looked around online and I can only find walker, denso, NTK 02 sensors. Pricing is quite a difference as I know that Denso and NTK are OEM suppliers to Japanese vehicles. Has anyone run universal denso or NTk sensors without problems? Has anyone run walker 02 sensors without issues? Your inputs are greatly appreciated.

PS. Its a Three wire 02 california emissions.
 
Hmong_1G

Hmong_1G

Name the Place and time.
Dec 31, 2008
280
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California
I think it was one of your article that I did the test too. It is where I take a digital multimeter and probe E1 and something else. Can't find it right now but I went by the chart that was listed. Thats how I can tell because I was not getting any readings at start up and after op temps. I was wondering why my long trips was horrible. Then I went by also the Haynes manual and tested the resistance. It was not in specs. OOps... did I state TSRM. LOL.. it was Haynes.
 
jetjock

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
Shaeff huh? Well, he's a pretty sharp guy but I'd have to see it. The Haynes manual borders on worthless and long horrible trips can be caused by lots of things, many not even related to the car ;)

You can't test the lambda cell using resistance and the heater may be OK depending on ambient temp. However if your fuel economy is down it could well be the O2. You should be getting at least one code though.

Test on car by using the TSRM procedure: hot engine and 2500 rpm. Look for a min of 8 cross counts in 10 seconds across E1 and OX. If your meter will do recording look for a max above 800 mv and a min below 200 mv on each swing. Average should be 450 mv. The fact is a sensor can be cross counting and the engine still be running rich or lean. Course, nothing beats a scope for this kind of thing.

Good test off the car is a propane torch. See the TCCS and Electrical section for that procedure. As long as the resistance is close to spec the heater can be checked by connecting it directly to a 12 volt source. Measuring its current is another way. If you really do need a new sensor I suggest the Denso.

Bosch invented the O2 sensor btw. You'd think after 45 years they'd know how to make 'em...
 
Hmong_1G

Hmong_1G

Name the Place and time.
Dec 31, 2008
280
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0
California
LOL on the bosch. Thanks a bunch Jetjock. I don't have a CEL and I have already put about 4k on the rebuilt motor already. This is the ORIGINAL 02 sensor. Thanks again. This is one of the few parts I didn't replace when I had the motor out and redone. Its about time.
 
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