LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Emissions numbers for stock engine

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Old Jun 16, 2003 | 05:30 PM
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From: Cincinnati, OH, USA
Emissions numbers for stock engine

I'm just curious what readings you guys have gotten with your stock engines.

With my '95, 111K miles, with stock exhaust/cat, reprogrammed PCM, and running rich lately, I had

HC: 17.5ppm (114ppm limit)
CO: 0.05% (0.63% limit)
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