3800 Replace dem ther Otwo senser...

[98 TGP TOY]

Just a reminder to people that automotive sensors dont last forever. My O2 sensor has always been in great working order. Bounced around at idle like its suppose to, and showed reasonable numbers at WOT. As of lately I always seem to get my best scans with 970-980 O2s. One day I tried to lean it out towards the 940 range like many recommended. Doing this caused a huge surge of kr on my scans. So i sent it back to 980s thinking my car just likes it rich. Well the other day I bought a new AC Delco O2 sensor for the hell of it, and its good I did. Installed it earlier today and went for a run a little later. Found out im actually in the 940-950 range.....not the 980 range that my old O2 sensor was reporting. So, previously, when i tried to lean it out to 940s I was actually leaning it out to 900s....eeek. My car seems to perform much better now, probably due to better fueling from more accurate readings. So just a reminder for those tuners out there with aging cars, replace your O2 sensor. It may seem to be in good working order, but sensors get old.

Thats it for this weeks Car Healthy Advice from your neighborhood Mike. Bye.

Click to read more...

 

[GTPPWR]

how much is a new O2? I've needed a new one for a while.

 

[Royalgtp]

just bought one off of ebay for 40 bucks.............guy has like 140 of them in a box..........


cough cough.......stolen.......


just waiting to get my power tunner now....


Yeah, i think its pretty stupid to tune wiht a 90-100k mile 02 sim.........so I got a new one.......

 

[framos242]

What's the number for the front O2 sensor?

Thanks!

 

[98 TGP TOY]

AC Delco # AFS 109

GM # 25312203


Do not buy a Bosch sensor. They do not have a good reputation.

Give it a couple days and do a search on ebay. The guy will probably have more to sell, thats where I bought mine.

 

[framos242]

I'm sticking with OE. I know about Bosch.

Thanks!

 

[3800SC98]

What are your readings supposed to be around for your O2 sensors (normally)??

I remember doing a scan with Alfredo on my car, and they kept jumping up and down real bad at iddle.

 

[98 TGP TOY]

At idle and cruise they should jump up and down everywhere. The O2 sensor isnt used at those conditions. When you go WOT they should be in the 940 range for non intercooled cars. Anything below 900 is running lean and dangerous if you arent intentionaly attempting to lean your car out. 940-980 range is pretty common. 980 is getting fairly rich.

 

[imported_Ron Vogel]

They are supposed to bounce until you get to PE mode. When you go to WOT is when they read steady.

 

[3800SC98]

Originally posted by 98 TGP TOY@Apr 20 2005, 12:38 PM
At idle and cruise they should jump up and down everywhere.  The O2 sensor isnt used at those conditions.  When you go WOT they should be in the 940 range for non intercooled cars.  Anything below 900 is running lean and dangerous if you arent intentionaly attempting to lean your car out.  940-980 range is pretty common.  980 is getting fairly rich.

[snapback]80354[/snapback]​

Thanks! I'll try to scan them at WOT.

 

[2KREDGHOST]

Thanks for the help fellas had a couple of questions but you all answered them for me. Now I could install my O2 sensor..........Leo

 

[horist]

While the Bosch may cause probs for some people for replacement OEM sensors (though I've been running a Bosch 13111 replacement for a while, however I only use it for street driving closed loop, WOT tuning is via a Wideband)... the Bosch LSU4/LSU4.2 are pretty decent (keep them in mind in case you go wideband... some replacement wideband sensors are over 100 bux... the Bosch LSU4 is the same as used in Volkswagons and can be had for under 40 bux ... )

 

[GTPPWR]

good to know. the day my car blew....and before that in my scans. Mine registered 900. then on the last day it said 880. when I first got the intense pcm....it was constint 920 910

 

[dole21]

Originally posted by 98 TGP TOY@Apr 20 2005, 11:25 AM
AC Delco # AFS 109

GM # 25312203


Do not buy a Bosch sensor.  They do not have a good reputation.

Give it a couple days and do a search on ebay.  The guy will probably have more to sell, thats where I bought mine. 

[snapback]80340[/snapback]​

anyone know if that part number will work for a 1999 gtp?

I don't think they'd be different but never know anymore with gm

 

[98 TGP TOY]

Yea...should work for 97-03 for sure. Probably 04s+ also, but i dont know for sure.

Here is the guys latest link:

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...sspagename=WDVW

There has been some thought on whether these are stolen or not. They come in a plain white box. Mine did have the AC Delco imprinted on it...from what i remember.

Anyways good luck.

 

[dole21]

got mine...thanks for the link

 

[GTP4ME]

I got one too. You can't beat it for $44.00 shipped.

Thanks

 

[3800SC98]

Originally posted by 98 TGP TOY@Apr 23 2005, 03:41 PM
Yea...should work for 97-03 for sure.  Probably 04s+ also, but i dont know for sure. 

Here is the guys latest link:

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...sspagename=WDVW

There has been some thought on whether these are stolen or not.  They come in a plain white box.  Mine did have the AC Delco imprinted on it...from what i remember.

Anyways good luck. 

[snapback]80832[/snapback]​

Is that for the 02 sensor on the down pipe? The one after the cat shouldnt' affect the car's performance right?

Thanks.

 

[98 TGP TOY]

If you have stock exhaust manifolds, this O2 sensor should be fitted in the rear manifold. If you have headers, it will be a bit lower. But yes it should be in front of the cat. The O2 sensor after the cat just checks to see if the cat is in good shape. It doesnt effect your car besides throwing a code..

 

[3800SC98]

Originally posted by 98 TGP TOY@May 3 2005, 04:31 PM
If you have stock exhaust manifolds, this O2 sensor should be fitted in the rear manifold.  If you have headers, it will be a bit lower.  But yes it should be in front of the cat.  The O2 sensor after the cat just checks to see if the cat is in good shape.  It doesnt effect your car besides throwing a code..

[snapback]82332[/snapback]​

Thank you. Will order one just in case.

 

[Royalgtp]

same guy I got mine from a few months ago.....

 

[CoolGTX]

thanks for the link, I got mine late last week. foety foe bux.