I have a 2004 Mazda 3 2.3L hatchback. I just had the engine replaced because the Crank Shaft in my old one broke at about 84,000 miles. Weird, mechanic never saw that before.
Anyway, after 40 miles my check engine light came on. And I know sometimes it can be because the gas cap isn't tight enough. So after driving home from work I unscrewed the gas cap and I heard a bubbling sound coming from the tank. Almost like the gas was boiling. I listened for 4-5 minutes, then heard a click and it stopped suddenly. Anyone know what this was? Don't want to start my car until gas vapors dissipate, so not sure if my check engine light has turned off.