MPG Help! - Page 2 - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-04-2005, 11:19 PM
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is your air filter clean?

I agree though...if your plugs and wires are new and in good shape then the O2 sensor should be next.
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Old 05-05-2005, 01:46 AM
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Default 02 sensor

Filter is clean and there is no carbon build up where the MAF sensor is its very clean. Where is this 02 sensor located? I am not that great with cars it took me awhile to get the plugs in the back out of my bonnie. I visualwould be great or atleasts to show the area where it is located. I amsure if i can find it i can replace it thanks. Also how is the NGk 02 sensor anyone try that one?
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Old 05-05-2005, 02:06 AM
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Default Re: 02 sensor

Originally Posted by LuxuriesPremier
Filter is clean and there is no carbon build up where the MAF sensor is its very clean. Where is this 02 sensor located? I am not that great with cars it took me awhile to get the plugs in the back out of my bonnie. I visualwould be great or atleasts to show the area where it is located. I amsure if i can find it i can replace it thanks. Also how is the NGk 02 sensor anyone try that one?
o2 sensor is right on top of the rear manifold.. right in the way of the rear spark plugs...

looks like a spark plug coming out of the exhaust
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Old 05-05-2005, 02:32 AM
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oohh ok i know what your talking about iwas wondering what that was... when i replaced the plugs i was tryign to figure out what it was it looks all rusted on and **** hope i don't have 2 much trouble removing it. I hope it will be worth it . where do i buy the 02 sensor gmpartsdirect ?
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Old 05-05-2005, 02:44 AM
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if you dont have the proper tool its gonna be a bitch to get off..

and yes

1994-1995 Vin # L,K,1
GM# 25312184 (AC Delco #AFS-75)
$34.07
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Old 05-05-2005, 03:25 AM
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How much is the tool and where can i get it? Also whats the part number for the 02 sensor im assuming its the oxygen sensor since thats all i can find...
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Old 05-05-2005, 10:06 AM
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Default 02

harofreaks got it for ya.....
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Old 05-05-2005, 10:55 AM
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Originally Posted by LuxuriesPremier
How much is the tool and where can i get it? Also whats the part number for the 02 sensor im assuming its the oxygen sensor since thats all i can find...
the tool is like a bit socket, but its got a notch cut out of it for the wires to come out...
any auto parts store should have them?


http://www.drivewerks.com/catalog/sh...CAT074_pg1.htm

here is that part number again
1994-1995 Vin # L,K,1
GM# 25312184 (AC Delco #AFS-75)
$34.07
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Old 05-05-2005, 10:59 AM
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Soak that sucker for a couple days with penetrating oil (hot and cold at different times) before you take it out if it'* rusty. Then you can use a BIG crescent wrench.
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Old 05-05-2005, 12:03 PM
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Default 02

Definitley soak it in penetrant. If it still won't budge, run the car 2 min then put a cold socket or wrench on it while the manifold is still hot. Be careful and wear gloves.
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