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International Automotive Technicians Network
Re: GM Computed Engine Timing
Posted to Technical Discussion Forum on 1/30/1998

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Truck came in, failed im240 emissions test. Readings as follows

Actual Cutpoint

Hc (gpm) 852 003.20 Co (gpm) 37.53 080.00 Nox(gpm) 1.22 007.00 Co2(gpm) 457.87 n/a

on the drive trace, hc was abov... Login to read more.