Evaporative system, codes P0441, P0440 and P0446

Greetings, friends.

Sorry for my bad English, I do not speak the language I use Google translator.

I have some faults with the Evap system. My car indicates the codes P0441, P0440, P0446, since I have it about two months ago. I took it to the mechanic but since there was no emissions test in my country he told me that this was not important, so I could ignore it, but then a series of events that require attention happened:

Order of events:

1) I was refueling and the person who fired the gas opened the stopper before I turned off the vehicle, the strange thing was that the car went off when I removed the plug.

2) Whenever I left the car in the garage it had a strong smell of fuel.

3) The car has a fuel efficiency of about 20 MPG (very low) and throws some black smoke through the exhaust.

Tests and Changes made:

Visit several in my country workshops and none handle much information about the Evap system. So I decided to look for information to solve my situation.

1) Vacuum the VSV, CCV motor solenoids, also energize them with a 9 volt battery and operate as expected and replace the hoses on the front.

2) The smell of fuel was due to the vent valve of the fuel tank escaping from the gasket and the valve did not close. Buy the gasket and vent valve, make a visual inspection of the hoses and see no leaks. For economic reasons I could not replace these hoses.

I thought that by changing the tank vent valve and the gasket, the Evap system failure had been solved. Three days after this, the engine was restarted with the same codes P0441, P0440, P0446.

 I do not know what else to do, I do not want to go changing parts without knowing which ones are good or bad.


I appreciate all the help you can give me.