Restorative maintenance retesting of 1977 model year passenger cars in Denver. Technical report

Technical Report · Tue Oct 31 23:00:00 EST 1978

OSTI ID:5554233

Jones, G T

The report describes the results of an exhaust emission testing program in which 24 relatively new vehicles sampled in a Restorative Maintenance Program in Denver were retested approximately one year later. Many vehicles had experienced maladjustments and disablements even though the owner reported that he felt his vehicle had been maintained according to the manufacturer's recommendations. Reductions in average emission levels followed the correction of the maladjustment and disablement actions to a point close to those after the prior tune-up. Modest fuel economy improvements were noted this year, probably due to the fact that the vehicles had overcome the 'green engine' effect.

• Research Organization: Environmental Protection Agency, Ann Arbor, MI (USA)
• OSTI ID: 5554233
• Report Number(s): PB-290666
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320203* -- Energy Conservation
Consumption
& Utilization-- Transportation-- Land & Roadway
33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
AIR POLLUTION ABATEMENT
AUTOMOBILES
EXHAUST GASES
FUEL ECONOMY
GASEOUS WASTES
INSPECTION
MAINTENANCE
POLLUTION ABATEMENT
VEHICLES
WASTES