I took the car in and they said I needed a new thermostat for the Coolant system. They said the pressure regulator for the fuel was fine and they could not find any drips or leaks of fuel, I do still have a slight smell of fumes sometimes but not consistently. The shop that fixed the car stated the fact that my thermo had failed caused my engine to use more fuel (like a choke or something) and that is why I was smelling the fumes. Does that sound reasonable to you? Or do you think I should continue to worry about it?