Is the low pressure fuel evaporative test required for gasoline vehicles with dual fuel tanks?

The low pressure fuel evaporative test is not required for gasoline vehicles equipped with dual fuel tanks because regulations typically focus on ensuring the integrity of the evaporative emission control system for only one fuel tank. This is based on the understanding that dual fuel systems may complicate emissions testing, and not all models are designed to require the same level of scrutiny for both tanks. Therefore, while manufacturers may implement certain designs or standards, the testing requirements often do not mandate such a test for vehicles with dual fuel tanks. Additionally, regulations may specify testing practices that are applicable to single-tank configurations, leading to this conclusion.

Understanding the context around evaporative emissions testing helps clarify why questions regarding dual fuel tanks arise in inspections and the rationale behind specific testing requirements for gasoline vehicles.