Oxygen sensor is... Strange

Discussion on fuel delivery & intake/exhaust tech & mods.
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lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Oxygen sensor is... Strange

Post by lastcall190 »

I went to replace the front O2s. Realized it wasn't a 5 minute job, had to get my son up from his nap, plugged the one I unplugged back in, fired up the car and it was f...ed. Idling like it was down a few cylinders, reeked of raw fuel and almost died when I put in gear. I scanned with HPT and it looks like the sensor isn't even registering anymore. Anyone else ever had one die by just unplugging it? Car ran perfect no less than 10 minutes prior. It seems easier to just pull the whole manifold to replace these things :lol:

Thanks

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
Shinkicker
Posts: 2
Joined: Fri Mar 08, 2019 12:27 am

Re: Oxygen sensor is... Strange

Post by Shinkicker »

Maybe a coincidence the sensor died, or terminals aren't making contact, I just changed my upstreams, a cut 7/8s wrench definitely was useful, I used the denso 234-4668, they were only $25 on Amazon
lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Re: Oxygen sensor is... Strange

Post by lastcall190 »

Thx. I got the same ones. Good call I'll see if I have a 7/8 that can sacrifice for greater good. The one clip broke so I have to find a new one of those too... :roll:

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
CrashTestDummy
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Joined: Sat Feb 07, 2015 2:31 pm
Location: Pearland, Texas

Re: Oxygen sensor is... Strange

Post by CrashTestDummy »

They do make O2 sensor sockets, which are many times cheaper than a 7/8" deep socket. Don't forget to unplug the harness first. Sometimes spinning the wiring together will break connections.
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lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Re: Oxygen sensor is... Strange

Post by lastcall190 »

No doubt I have a few sockets. Its just that the space needed to actually spin the ratchet/wrench eludes me. I managed to somehow unclip the harness, which is potentially why I'm in this spot :lol:

The male clip actually broke, though I managed to not remove the plug. Its not even that one that is screwed, confirmed by HPT

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
Mpotsie84
Posts: 20
Joined: Sat Aug 22, 2020 8:28 pm

Re: Oxygen sensor is... Strange

Post by Mpotsie84 »

Can anyone recommend any cheap downstream O2 sensors that they've had luck with
lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Re: Oxygen sensor is... Strange

Post by lastcall190 »

Deleted my rear O2s so i never replaced them but used denso sensors for the fronts with no issue. Have to imagine they would be fine for a downstream application (denso, not the same exact model sensor)

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
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