Now that you tell me that, it can be the problem of the "EVAP" system better known as "canister purge".
The function of the EVAP system is to allow the appropriate ventilation of the fuel system and prevent evaporations from being discharged to the atmosphere, that is, the vapors must be retained and stored during the engine is off, which is when the greatest amount of evaporation occurs. When the engine starts these vapors must be "heartless" and burned in the cylinders. In most systems, storage occurs in an activated carbon tank, commonly called Cánister.
It is common to generate empty, but it is very little that is generally generated.
Returning to the other topic also reviews the fuel filter.
The pressure of the bomb and the flow that is
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