AN EVALUATION OF RESTORATIVE MAINTENANCE ON EXHAUST EMISSIONS OF 1975-1976 MODEL YEAR IN-USE AUTOMOBILES

This report describes the results of an automobile exhaust emission testing program conducted by the U.S. Environmental Protection Agency. The purpose of the program was to go beyond EPA's basic surveillance testing to determine the reasons for the difference in emission levels between vehicles on the road and their pre-production counterparts in certification. A total of 300 vehicles were subjected to a series of tests before and after various stages of tune-up. The vehicles were low-mileage 1975 and 1976 models of the three major domestic manufacturers and were obtained from private owners. The testing was performed in three cities by independent laboratories under contractor to EPA. Significant findings include the confirmation of the relatively poor emission performance of newer vehicles, the wide extent of maladjustments and disablements and the large emission reductions possible upon correction of these problems. (Portions of this document are not fully legible)

  • Corporate Authors:

    Calspan Corporation

    4455 Genesee Street
    Buffalo, NY  United States  14225

    Environmental Protection Agency

    Emission Control Technology Division, 2565 Plymounth Road
    Ann Arbor, MI  United States  48105
  • Authors:
    • Bernard, J C
    • Pratt, J F
  • Publication Date: 1977-12

Media Info

  • Pagination: 430 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185925
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: EPA/460/3-77/021
  • Contract Numbers: EPA-68-03-2386
  • Files: TRIS
  • Created Date: Dec 29 1979 12:00AM