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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 11-02-2007, 02:57 PM   #21
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Take a look at the BLM (long term fuel trim). 128 is desired, higher is lean, lower is rich.

Was the 44 running, at idle, or with the vacuum line pulled off the pressure regulator?
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Old 11-02-2007, 02:59 PM   #22
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The pressure was at idle and it was about 47 with the line removed.
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Old 11-02-2007, 06:35 PM   #23
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Ok I scanned on the way home and only saw 1 degree of KR during the trip and kinda got it to do its thing in 2nd gear with no KR but didn't sound right. The fuel trims seem to bounce around. I see like 119 at idle and bouncing between 128 to 140 driving and at WOT. I am guessing that I am running lean then?
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Old 11-03-2007, 07:46 PM   #24
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Ok I just scanned for a half hour drive and found the LT to stay around 124-130 while driving and the ST was bouncing all over between 119 at idle and 140 while driving. The IAT was at 90-95, and TPS voltage bottomed WOT at about 4.20V. I do remember on my way to work on friday I gave about 3/4 throttle and saw my boost gauge jump to about 8psi and instantly fall back to about 5-6 psi. Maybe it it the BCA. I don't know but I thought I would give an update with numbers.
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Old 11-04-2007, 06:22 PM   #25
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You can rule out the BCA if you pull off the bottom line from it. If you can't recreate the boost dump, it'* the BCS failing or PCM commanding a dump. I don't think you should be compensating for a lean condition on purpose, looking at your mods. I'm wondering about vacuum leaks or FPR, possibly.
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