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.

Slow O2 at idle

Old Dec 2, 2004 | 06:52 PM
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Default Slow O2 at idle

in park, the rpms rev up then come back down, rev up then come back down. And this happens pretty slow.
But as soon as i put it in drive the idle is smooth.
Any ideas what'* up with that?
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