The Clean Air Act of 1990 allows a different emission test for areas that do not meet Environmental Protection Agency air quality standards. The new test is called Enhanced Inspection/Maintenance (I/M). "Enhanced" distinguishes this test from the "Basic" emissions test. The enhanced test requires the vehicle to be tested on a dynamometer and requires the vehicle's tailpipe emissions to be analyzed. This manual was written by Ford to help mechanics perform these enhanced tests and diagnose vehicles based on them. The book has five sections, which include description and operation of the system and its components. diagnostic methods, symptom charts, diagnostic subroutines (including Diagnostic Trouble Code Charts), Pinpoint testes, and reference values. Buy now to own this original manual.
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