This report documents the conduct, methodology, and results obtained from a two-phase study. The objective of an inspection regime would be to detect those malfunctions which are most likely to result in mass emissions to the atmosphere. The 'short cycle' project was initiated to evaluate two methods (loaded and unloaded) of inspection and resulting maintenance. The primary objective was to determine emission reductions, costs, cost effectiveness of the Idle (unloaded) and dynamometer Loaded Steady State (L.S.S.) inspection and maintenance regimes. A secondary objective was to determine how well various short emission inspection test, including Idle and L.S.S., correlated with the 1972 and 1975 CVS Federal Test Procedures. Test procedures and vehicle emission summary tables are appended to the report.