gas cap light???

[exploded06]

I have a 06 xlt 4.0 v6. the gas cap light is on. its came on before and I just tighten the cap and it went off this time its not working been on for 2days now. need help

 

[exploded06]

well I geuss no one has a idea on this question so maybe this afternoon I can. I will post it up later on and maybe help you guys and gals if the light ever comes on. a friend of mine is gonna smoke my vapor recovery system