In this video I go over how to fine a vacuum leak or an evap leak using an automotive smoke machine. the machine i will be using is the autoline pro shop series smoke machine. It has a built in ...

As part of a vehicle’s emissions control system, the EVAP (evaporative emissions control) system traps fuel vapors from evaporated fuel. The system then sends the fuel back to the tank for use.

But there are lots of valves inside the evaporative emissions system that leak, too. The smoke machine will help you figure out exactly where it's coming from. Have a question about cars?