What kind of test is required for vehicles manufactured between 1969 and 1980?

For vehicles manufactured between 1969 and 1980, the required test is the Two-Speed test and Tampering Inspection. The Two-Speed test measures the emissions of the vehicle during low and high speeds, allowing inspectors to evaluate performance under different operational conditions, which is essential for older vehicles that may not have optimal emissions control technologies.

Additionally, the Tampering Inspection is a crucial part of this process, as it determines whether any emissions control devices have been altered or removed, which can significantly affect a vehicle’s emissions output. These inspections are designed to ensure compliance with emissions standards and help reduce air pollution from older vehicles, which often have higher emissions levels due to less stringent regulations when they were manufactured.