Gasoline smell in ford-mercury 1997

my father have a mercury 1997, and my problem is there has been a gasoline smell inside the car most of the time. i had the gas tank checked for any leak, but there is no sing of it, i had change the gas cap, and finally changed the carbon filter. none of the previous methods seems to be useful.

please help me, i am dying inside it.

Does it smell like that all of the time, or only when the tank is very full?

Open the hood, start the engine and while it’s idling, take a flashlight and look at each injector to see if any of the O-rings are leaking and dripping gas on the engine.


that smell some times will the car idling, increase if the car parked on direct sunlight.