Doubtful. There is a means of detecting leaks in the fuel vapor recovery system which would increase emissions. Chrysler does that by pumping the tank and vapor recovery lines up to two pounds of pressure, then they watch to see how long it takes to bleed down. Gas tank filler hoses usually fit pretty tightly, even without a hose clamp, so while there might have been some seepage, I suspect it wasn't bad enough to be detected as a leak. Had that happened, a diagnostic fault code would have been set, and the Check Engine light would have been turned on.
Even when there's a "gross leak detected", which most commonly is due to a loose gas cap, that has nothing to do with the pressurized fuel supply system for the engine. You can have the largest of leaks involving the tank, but pressure is still maintained in the supply line to the engine. It is that pressure that is needed for the injectors to work and for the engine to start and run.
Friday, March 24th, 2017 AT 5:48 PM