Fuel smell

[laurentj23]

Everytime i crank my car when it's cold, i smelt a strong fuel smell. I tried to locate it but mostly arnd the passenger front tire area. This only happen when the engine is cold. I dont spot any leaks at all, and the smell is gone after the car is warm. What could it be? I just replaced the fuel filter as well as the hoses. I sometimes can smell it while inside the car to.

One more thing, if i replace my fuel pump to walbro, would it decrease my gas mileage?