AUT 121
Performance And Diagnosis II.
Mount Wachusett Community College · UGRD · Fall 2026
Catalog description
This course is a continuation of AUT 120 Performance and Diagnosis I. Students will learn about the various fuels used today and the problems associated with them. Fuel delivery systems starting with the carburetor through todays fuel injection systems will be studied. Emission control systems such as PCV, EGR, EFE, AIR, and the catalytic converter will be examined along with the pollutants they reduce. Computerized engine controls along with their sensors will be tested and examined for proper performance. On Board Diagnostics II will be discussed and explored. Students will complete sample questions in preparation for the ASE Certification exams. Spring. Prerequisite: AUT 120 .
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