A recent study of Wisconsin I/M program Mass Emissions Repair Effectiveness, conducted by Gateway Technical College (auto technician training) Racine, WI, tends to raise more questions than provide answers to questions about I/M emissions-test repair value. The study focused exclusively on two 5L General Motors Corp. engines fitted in a group of 1980s vehicles, of which “many … are failing the initial Wisconsin I/M 240 test, failing the retest, and qualifying for emissions waivers due to ...

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