Hi, is there any way to clean a heated 02 sensor from a 1997 3.8L Buick LeSabre V6? The car only has 37,000 miles, but occasionally going up a hill in overdrive (going at least 45 mph, but up to 110 mph), the rpm's will rhythmically surge several hundred rpm's. The car also idles a little erratically (it idles smoothly most of the time but the revs jump around every 30 seconds or so, then smooth out)I had a Flowmaster 80 series exhaust on the car, and, thinking that the free flow muffler was confusing my OBD II, I swapped the stock muffler back on. The car will still surge going up hills while in overdrive (especially if I give it enough gas in overdrive to load the motor pretty good, but not enough gas to make it kick down to 3rd). A GM technician told me that a lazy O2 sensor may cause my condition. I know that the O2 sensor is on my rear exhaust manifold. I think there is also a sensor behind the catalytic converter? Could this sensor be at fault too? I'd appreciate anyone's thoughts on why my V6 would be acting up while cruising up hills in overdrive.



[This message has been edited by Mister MOPAR (edited June 05, 2001).]

 

O2 sensors are only like 20 bucks, and if a GM tech says that might be it, just get one and try it out. If it's not that, might wanna check the fuel system out.

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1985 Camaro SC - 2.8L, auto.

Mods:
Removed air baffles, mandrel bent cat-back pipes (but stock replacment muffler, Dynomax Turbo and Catco converter are on thier way)

 

The O2 sensor for my 1997 Buick LeSabre with 3.8 V6 is $69.99. I shopped around, too, so that is the best price I can get.

 

I doubt you'll find much info on this Camaro/Firebird website regarding your '97 Buick Lesabre 3.8. Search the internet for a Buick website.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

Just reread this post. It's a HEATED O2 Sensor... DOH! Sorry... I missed that part. Yeah, they're more expensive than the regular ones...

Hehe, sorry again...

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1985 Camaro SC - 2.8L, auto.

Mods:
Removed air baffles, mandrel bent cat-back pipes (but stock replacment muffler, Dynomax Turbo and Catco converter are on thier way)