WEVTU reported earlier this month that Wisconsin is ready to use OBD-II (vehicle onboard diagnostics) in place of current I/M dynamometer emissions testing. Data not available for that story casts doubts on Wisconsin's plan. Researchers in Colorado working on the I/M issue have obtained the state's emissions-testing data, which indicate that 116,945 1996-and-newer vehicles were I/M-240 tested and their OBD systems simultaneously checked for emissions related faults. In the total group, ...

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