O2 Sensor Stuck. CRAP!
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,448
Likes: 1
From: Tracy CA
O2 Sensor Stuck. CRAP!
Okay. L98 with about 106K. I'm changing out the O2 sensor to try to fix the lobing idle. I got the stock one off in 2 pieces (pigtail, upper piece), but the (pickup???) piece is still in the A.I.R. tube (Guess that's what that thing is). It's at such an angle that it's really hard to get a socket over the thing. Was gonna pull out that A.I.R. tube (Guess that's what that thing is???) but I think one of the Torx (
) bolts is shearing.
Right now I've got everything sprayed down with WD40.
I'll get the thing, I just had to come inside before something got thrown!
) bolts is shearing.Right now I've got everything sprayed down with WD40.
I'll get the thing, I just had to come inside before something got thrown!
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Instead of WD40 try some PB Blaster on rusted bolts and such. Leave it on over night, hit it again the next day and you should be ok.
If a socket won't fit, try a 6-pt box or open end wrench.
If a socket won't fit, try a 6-pt box or open end wrench.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,448
Likes: 1
From: Tracy CA
Well, I got me a new O2 sensor, and I'm gonna put it somewhere!
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart
:o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.
BTW--- I'm doing this on a cold engine...
TIA
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart
:o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.BTW--- I'm doing this on a cold engine...
TIA
Last edited by EPiC Vette; Sep 12, 2004 at 02:26 PM. Reason: Additional question
Race Director
Joined: Jan 2004
Posts: 18,727
Likes: 711
From: Bergen County, NJ
Originally Posted by CFI-EFI
I don't know what you are wrenching on, but the O2 is screwed in to a bung in the exhaust pipe. Nowhere near an AIR tube (on my car) nor any Torx bolts.
I changed mine a few weeks ago, it's screwed into the exhaust Y-Pipe. It took a little muscle to get loose. Used anti-sieze on the new one.
Burning Brakes
Joined: Jul 2004
Posts: 956
Likes: 0
From: Mesquite Nevada
Originally Posted by EPiC Vette
Well, I got me a new O2 sensor, and I'm gonna put it somewhere!
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart :o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.
BTW--- I'm doing this on a cold engine...
TIA
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart
:o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.BTW--- I'm doing this on a cold engine...
TIA
Drifting
Joined: Mar 2004
Posts: 1,504
Likes: 0
From: Byron Center MI
Originally Posted by EPiC Vette
Well, I got me a new O2 sensor, and I'm gonna put it somewhere!
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart :o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.
BTW--- I'm doing this on a cold engine...
TIA
Is that bung on the drivers- or pass-side manifold?
Also--- any idea on what I tore apart
:o ??? It's on a tube coming up from the exhaust manifold on the pass side. Some kind of sensor that has the same pigtail as the new O2 sensor. Car runs no different without it.BTW--- I'm doing this on a cold engine...
TIA
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Racer
Joined: Aug 2004
Posts: 379
Likes: 170
From: Buffalo Grove IL
I just replaced my O2 sensor on my '89 yesterday. If you open the hood and look down at the exhaust manifold on the driver side, you'll see the end of it sticking out towards the firewall, just below the flange where the exhaust manifold connects to the downtube with the precats.
I removed mine from the topside, it appeared it would be more difficult from the bottom. The wire from the O2 sensor went to a little plastic clip mounted near the oil filter, I was able to pop that off from the underside of the car, but it turns out you could actually unclip it--I was just going by feel, though, and couldn't figure out how to unclip it by feel.
Anyway, I started putting the new one in from the underside of the car, as you can get a good view of the bung there. Then I tightened it up from the topside again.
As for clearing up my rough warm idle, I'm not sure. I took it for a 10 minute trip down the highway, and the car still felt a bit lean at part throttle. When I stopped to turn the car around, it was still idling bad
. But, when I got home, it seemed a bit better at idle--maybe the ECM tables were starting to fill with better data? I don't have a very good handle on the fuel injection system yet :-/
Good luck!
Ben
I removed mine from the topside, it appeared it would be more difficult from the bottom. The wire from the O2 sensor went to a little plastic clip mounted near the oil filter, I was able to pop that off from the underside of the car, but it turns out you could actually unclip it--I was just going by feel, though, and couldn't figure out how to unclip it by feel.
Anyway, I started putting the new one in from the underside of the car, as you can get a good view of the bung there. Then I tightened it up from the topside again.
As for clearing up my rough warm idle, I'm not sure. I took it for a 10 minute trip down the highway, and the car still felt a bit lean at part throttle. When I stopped to turn the car around, it was still idling bad
. But, when I got home, it seemed a bit better at idle--maybe the ECM tables were starting to fill with better data? I don't have a very good handle on the fuel injection system yet :-/Good luck!
Ben
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by EPiC Vette
Well, I got me a new O2 sensor, and I'm gonna put it somewhere!
Originally Posted by drumboytroy
You tell em' man...It's your O2 sensor and you can put it where ever you want! 
:RACE ON!!!
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,448
Likes: 1
From: Tracy CA
Okay. Cooler heads DO prevail! 
Changed out the O2 sensor... Thanks, all!...
Once I FOUND it (in front of my face :o ), I jacked the car up, pulled it (it was only about finger-tight
), & replaced it.
The other thingie (EGR temp switch), I'm just gonna repair ( ) & stick back in.
We'll see if this fixes the idle....
Changed out the O2 sensor... Thanks, all!...
Once I FOUND it (in front of my face :o ), I jacked the car up, pulled it (it was only about finger-tight
), & replaced it.The other thingie (EGR temp switch), I'm just gonna repair (
) & stick back in.We'll see if this fixes the idle....
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
You might as well replace the EGR switch now, but it's easier to splice the new one into the old wiring because the switch is plugged in down behind the distributor.They are often the cause of a EGR code and they're cheap.
I didn't need to warm up the car-the 02 sensor was pretty easy to remove. But I see you've already done that.
I didn't need to warm up the car-the 02 sensor was pretty easy to remove. But I see you've already done that.
