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Old 08-22-2005, 03:07 PM   #11
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Quote:
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Originally Posted by jr's3800
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any one the ACDelco P/N for 2002 bville? N/A

is it AFS109 or AFS123??
I searched it and the one you want is AFS109 GM Part # 25312203

This is for an NA'd 3800 K engine...

The AFS109 is the sensor that is in the rear exahust manifold, the AFS123 is the sensor after the Cat...

So you want the AFS109

Good Luck
thannks!!! any 1 have a techinfo for it?? never done 1 be4
I guess there is no techinfo on that...lol

when I do my sensor I'll have to do one with pics...

If you look on the rear Exahust manifold( firewall side ) you'll see a spark plug looking sensor on the top of the rear manifold.... It will have a 4 wire O2 sensor... I use a Cresent wrench on mine... I have seen people use an O2 sensor socket, Makes it easy for sure... Its an easy job, take you a few minutes...

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Old 08-22-2005, 05:50 PM   #12
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Well, I had to buy that freaking socket...since my advance auto parts is lame and doesn't loan them. But I can't complain, I found the delco in town for $47, so I think I got a darn good deal.

Here it is, tell me what you think. Does it look normal? Bad?

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If it looks fine, I will keep the new one in anyway though.

I guess only time will tell if it helped or not.

It was kinda fun though, I have never worked on my car in barefeet and sitting on top of my engine.

P.*. Plugs and wires are new within the last 5000 or less...that is why I didn't do them as well today.
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Old 08-23-2005, 10:57 AM   #13
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Quote:
Originally Posted by Logan
Well, I had to buy that freaking socket...since my advance auto parts is lame and doesn't loan them. But I can't complain, I found the delco in town for $47, so I think I got a darn good deal.

Here it is, tell me what you think. Does it look normal? Bad?



If it looks fine, I will keep the new one in anyway though.

I guess only time will tell if it helped or not.

It was kinda fun though, I have never worked on my car in barefeet and sitting on top of my engine.

P.*. Plugs and wires are new within the last 5000 or less...that is why I didn't do them as well today.
It looks a lot like you have been running rich in the recent... The tip should be a cream color, I notice that some of it is light colored, and the rest is dark( Flow side of the sensor ).... I'd say you were due for a new one...

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Old 08-23-2005, 11:07 AM   #14
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YAY, I am not out $60 for no reason.
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Old 08-23-2005, 11:19 AM   #15
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Quote:
Originally Posted by Logan
YAY, I am not out $60 for no reason.

Its strange tho, my first sensor puked at about 75,000 miles... The second died a nasty death after the first upper ruptured... 89,000 miles I think... The third is tanking on me now.. 142,000 miles... I have had bad luck with these O2'*.... But I don't think they take too well to contamination either...lol

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Old 08-23-2005, 12:05 PM   #16
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My old one in the 93 looked like that. And it'* not surprising considering when I bought it, the plugs had eroded to .090". Alotta unburnt fuel going past that sucker. The 95'* O2 is on the way from GMPD right now.

Keep in mind for all those that have UIM or LIM failures, coolant isn't a good thing for O2'*, either.

Good work, Logan. This was an excellent topic.
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Old 08-23-2005, 12:09 PM   #17
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Quote:
Originally Posted by willwren
My old one in the 93 looked like that. And it'* not surprising considering when I bought it, the plugs had eroded to .090". Alotta unburnt fuel going past that sucker. The 95'* O2 is on the way from GMPD right now.

Keep in mind for all those that have UIM or LIM failures, coolant isn't a good thing for O2'*, either.

Good work, Logan. This was an excellent topic.
Yes, after the UIM failure I had, my O2 came out pinkish( Dex Cool )

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Old 08-23-2005, 01:08 PM   #18
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Quote:
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My old one in the 93 looked like that. And it'* not surprising considering when I bought it, the plugs had eroded to .090". Alotta unburnt fuel going past that sucker.
The same thing is probably what caused my to fail or become lazy as well. Just eyeing it, my guess was my gap was nearly DOUBLE what it should have been on my plugs. Probably from letting the plugs go for so long, the o2 sensor fouled up...hence I didn't see any economy improvement when I did change the plugs and wires.

I will probably dirve my car another 100 miles to let the PCM (or is it the ECM?) learn the new readings, then I will top off my gas tank and start calculating my MPG again.
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Old 08-23-2005, 02:18 PM   #19
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YAY, I am not out $60 for no reason.
yes and no.. I have a month old one for a 95 sitting in my box of parts. Woulda sent to you if I knew you wanted one.
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