O2 Sensor Test - How to check to see if your aftermarket O2 sensor is bad - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-24-2010, 11:23 AM   #1
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Default O2 Sensor Test - How to check to see if your aftermarket O2 sensor is bad

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Old 09-24-2010, 11:23 AM   #2
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Jared linked me this, I never knew this trick. Figured I'd pass it on.
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Old 09-24-2010, 11:42 AM   #3
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I have to try this today cause mine is acting all stupid...i think
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Old 09-24-2010, 03:14 PM   #4
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Typically they respond slower too. My Autometer gauge froze at 14.7 when its sensor died.
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Old 09-24-2010, 03:55 PM   #5
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sweet, thanks im gonna have to test my zeitronixs one....
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Old 09-24-2010, 11:22 PM   #6
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this should be a sticky! my car keeps going lean, i hope its the o2, its been running on leaded fuel since tuned so i imagined the o2 was probably going
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Old 09-25-2010, 08:55 AM   #7
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Note that this is a WBO2 test, not for a stock narrowband, although it might be interesting to see results with a 4 wire.
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Old 09-25-2010, 02:04 PM   #8
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Great thread. Mine has been acting screwy too. I am glad there is a semi-concrete way to test these finally.
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Old 09-25-2010, 02:12 PM   #9
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I'm not convinced and I actually don't consider the AEM a reliable unit to begin with. A friend gave me his to repair (broken display), it actually displayed 14.5-14.7 WITHOUT the sensor connected!
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Old 09-25-2010, 05:05 PM   #10
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Quote:
Originally Posted by Reverant View Post
I'm not convinced and I actually don't consider the AEM a reliable unit to begin with. A friend gave me his to repair (broken display), it actually displayed 14.5-14.7 WITHOUT the sensor connected!
Almost all of them do this. My autometer wideband, AEM, and a friends Zeitronix all do the same.

Just about everyone uses the same Bosch sensor, what is different is how they read them and interpret the data. I think you can order a zeitronix that uses an NGK sensor.
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Old 09-25-2010, 05:07 PM   #11
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Also a very good read that I am sure most of you have seen, but for those that have not.
http://www.fordmuscle.com/archives/2...tout/index.php
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Old 09-25-2010, 05:39 PM   #12
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Quote:
Originally Posted by Aricjm15 View Post
Almost all of them do this. My autometer wideband, AEM, and a friends Zeitronix all do the same.

Just about everyone uses the same Bosch sensor, what is different is how they read them and interpret the data. I think you can order a zeitronix that uses an NGK sensor.
Yikes! My innovates (LM-1, LM-2, LC-1s) tell me if the sensor is disconnected, if the heater has gone bad or the sensing element has gone bad. I'm not sure I would trust a wideband that doesn't even know if the sensor is connected or not.
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Old 09-25-2010, 05:47 PM   #13
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this is a great test to know about.
a friend told me about it a while ago and I wasn't sure if it was accurate/legit.

Now I know
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Old 09-25-2010, 05:57 PM   #14
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Quote:
Originally Posted by Reverant View Post
I'm not convinced and I actually don't consider the AEM a reliable unit to begin with. A friend gave me his to repair (broken display), it actually displayed 14.5-14.7 WITHOUT the sensor connected!
According to the documentation this isn't a bug, it's a feature! Lol. It allows you to callibrate your ecu to a known voltage.
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Old 09-25-2010, 06:22 PM   #15
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Quote:
Originally Posted by 18psi View Post
Now I know
And knowing is half the battle...YO JOE!
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