replaced gas cap,changed oil,replace air filter
engine light on.got it checked said a small emistion leak.do i need a mechanic? on 2008 Chevrolet Aveo
To find a leak in the fuel tank, fuel lines or charcoal canister a repair shop will use a "smoke machine" that generates an inert gas that locates the source of the small leak, or they may use a vacuum pump to test valves or even a scan tool to close valves and test them. Nothing you can do yourself.
Pat when you say inert gas that is based on the tech using Nitrogen in the test procedure. Most techs do not use Nitrogen in testing with a smoke machine. When using a smoke machine with just shop air you are inviting a fire.
yes, you better call for the help of a mechanic.