02 Sensor Replaced , CEL Light still on?

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JimmyL
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Joined: Thu Apr 24, 2008 8:17 pm
Location: Bellingham WA

02 Sensor Replaced , CEL Light still on?

Post by JimmyL »

Hello, I have a '92 w/ EJ22 NA . I have a code 32 defective 02 sensor light triggered. I replaced the sensor w/ a cheap one I found online, and the light still came on. I went and bought a Bosch unit, installed that, and the same thing. The car runs like crap. It won't stay running till it's warmed up a bit, like a minute or so, and after it stays running, the idle varies. When driving, it stutters and misses unless it's nearly wide open. After reading a bunch of posts, I went and replaced the water temp sensor, which made no difference. I checked the MAF voltage output, which seems to be within specified range. I have 12Vdc and ground to the 02 sensor, and continuity from the 02 sensor signal wire to the ECU. I'm stumped. Anybody have any ideas?
Thanks!
Legacy777
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Post by Legacy777 »

Do the sensors you've bought come with the connector, or are they spliced into the existing connector?

Have you tried resetting the ECU? If not, do that. Instructions are on my site
www.surrealmirage.com/subaru/engine.html
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
Soul Shinobi
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Post by Soul Shinobi »

Resetting the ECU would be vital. I'm looking forward to this turning out okay, I need a new O2 soon too I think...
-Nick
1992 BC Legacy L Sedan AWD 5MT 272,000 - Wish you the best
1998 BK Legacy L Wagon 5MT 234,000 miles - RIP
2002 SF Forester S Wagon 5MT 215,000 miles - Current winter sleigh
1986 FC Mazda RX-7 GXL Coupe 5MT 155,000 miles - Summer cruiser
JimmyL
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Joined: Thu Apr 24, 2008 8:17 pm
Location: Bellingham WA

02 Sensor Replaced , CEL Light still on?

Post by JimmyL »

The first sensor I bought did not have the connector, so I spliced in my old one, taking care to get the wiring correct. . The Bosch sensor I bought had the correct connector. I tried resetting the ECU, which seemed to work fine. The code for 02 sensor came on minutes after clearing the ECU. Are leaky O-rings on the injectors problematic, and could they be the culprit? There's a place near where I live that rebuilds injectors for $18 each, which seems like a good deal. [I don't have much experience working on FI vehicles.]
Thanks!
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