1995 Bonny Supercharged 3800 - Page 2 - GM Forum - Buick, Cadillac, Chev, 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 07-09-2003, 05:00 PM   #11
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I dunno if it is worth a shot... But i'd definetly scan it for codes etc, and check everything else. Ever spray your engine with water? Maybe your PCM is on the fritz, it also might be a Faulty EGR, but not my frist guess.
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Old 07-09-2003, 10:08 PM   #12
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Default Re: Scan Results

Originally Posted by bigtjohnson
I had a friend scan my 95 today and he told me the the O2 sensor was pegged on the "rich side" at WOT. This kinda contradicts my whole lean theory. Does he know what he'* talking about? Will your exhaust man. get orange when running lean or rich both? When he started talking about millivolts and crap the whole operation flew over my head.



If your manifold is glowing, you are running lean, end of story. I would think the O2 is giving a false reading, telling the computer to lean out the mixture. The scan tool is only going to read what the computer 'sees' and not what is REALLY happening. Does your 95 have (2) O2 sensors as OBD II was comming in 1996? If you are running full rich at WOT you should be experiencing excessive carbon build-up on the pipe tips and bumper. If not, you are not running rich. Keep us posted.

I am not a certified mechanic, but I think if you remove the O2 output you will get a SES light. Then this will make the car run on a default setting factory, because after all the car cant just DIE if the O2 sensor was out of wack, this would be unsafe and MILLIONS of cars would be dead on the side of the road daily. So, pull the sensor and see what happens when you recreate the 'glowing' conditions. I bet you stop running lean.

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