Record Display for the EPA National Library Catalog


Main Title An evaluation of sealed idle mixture adjustment on 1977 Buicks /
Author Marschall, Karen E.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Test and Evaluation Branch.
Publisher U.S. Environmental Protection Agency, Office of Air, Noise, and Radiation, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Test and Evaluations Branch,
Year Published 1980
Report Number EPA-AA-TEB-81-8
Stock Number PB81-132979
OCLC Number 776693916
Subjects Motor vehicles--Motors--Exhaust gas ; Motor vehicles--Motors ; Buick automobile
Additional Subjects Automobiles ; Carburetors ; Exhaust emissions ; Mixtures ; Screws ; Seals(Stoppers) ; Air pollution control equipment ; Internal combustion engines ; Performance tests ; Buick vehicles ; Idle adjustment screws
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA AA-TEB-81-8 NVFEL Library/Ann Arbor, MI 02/21/2012 DISPERSAL
NTIS  PB81-132979 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22 p. : ill., charts ; 28 cm.
This report describes the results of an EPA program conducted on 48 in-use passenger cars. Each of these vehicles was a 1977 Buick equipped with a 350 CID engine and a four barrel carburetor. Some of these engines were equipped with special carburetors which had lead plugs covering their idle mixture screws to prevent maladjustments. The purpose of this program was to gather information on current vehicles which will allow EPA to project the effectiveness of similar systems after they have been employed on future vehicles. The program included direct mail solicitation, a parking lot survey, and complete FTP testing. This work was conducted in the Detroit area and at EPA's Laboratory in Ann Arbor during the summer of 1980. The results indicate that this technique for sealing the idle mixture screws is an effective method for preventing the adjustment of the idle mixture. Average idle emission test results for the sealed carburetor vehicles were similar to the results for untampered vehicles with conventional carburetors. Average idle emissions from vehicles with broken or missing limiter caps were substantially higher.
Cover title. "November 1980." "EPA-AA-TEB-81-8." Includes bibliographical references (p. 8).