A program of emission testing and carburetor adjustment to reduce the levels of hydrocarbons and carbon monoxide in the exhaust gases and to demonstrate fuel economy improvements was held in Charlottetown during the week of July 14 to 19, 1980. The program was a co-operative effort of the Centre of Energy Studies of the Technical University of Nova Scotia, the Mobile Sources Division of the Air Pollution Control Directorate, Environment Canada and the Prince Edward Island Energy Corporation. Five hundred and twenty vehicles were tested during the period.The program was well received by the public and indicated that only 32% of the vehicle fleet were within specification when initially tested. A large percentage of these vehicles were satisfactorily adjusted.Mailback record cards were used to obtain an indication of the improved fuel economy. The data suggests that a substantial saving in fuel can be attained through carburetor tuning for low exhaust emissions.