Just did dealer insisted 1st service. On way way back to the Island, got check engine light. I have done an " Over the sand' run once prior to this. It started on highway back home. Gas cap Tight. I assume good fuel[ Bro runs a SS Camaro.} from same station. Any Ideas ? cost a fortune & a days pay to go to a dealer off island. I'm just a service industry person, not a rich person.