Poor Fuel Economy, Need Help Badly!! - Page 3 - 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 11-20-2007, 04:06 PM   #21
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What is the case learn procedure? Is that a certain task/parameter that one should do when putting a new engine in a car? My uncle built the engine, I know a ton about cars but I don't really know exactly what HE did to get this thing running.
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Old 11-20-2007, 04:09 PM   #22
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A case learn is an optimization for the pcm to know where TDC is located. It can only be performed (to my knowledge) on a running engine.
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Old 11-20-2007, 07:39 PM   #23
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I don't know if that was done, but the motor does run, and I don't have any check engine lights.
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