A few weeks ago I took it for a long drive. The engine began to miss and white smoke poured out the exhaust with strong gas smell. Garage checked and found injectors not working properly. Put can of Seefoan (injector cleaner) in and after a few minuets it cleared right up. Has been working great up until a few days ago and came down with the same thing. This time Seafoam did not work. I cleaned and tested injectors and all are fire-ring. Checked plugs all look the same and clean, replaced spark plug wires, pumped fuel through to make sure it is clean with no contaminants and erased codes. The white fog smells of gasoline not antifreeze and I only have 50K on the Corvette so why would it work Ok and then a couple of weeks later start up again. Then frustrated went out to start it up and ran great no smoke. I have run out of solutions that is why I think I need a mechanics expertise.