Mr. Kiato. If you can't close the car from the trunk, then you have
leaking or the vaccum pump is burned. Test it located under rear right seat.
If you want desactived the fuel door actuator only disconect its two little hoss and joint both end.
But if the fuel door actuator close it means that vacuum line is working.
Try to close and open the doors from the passanger door. If it close and open all the doors then the vaccum system is OK and the trunk actuator is "finito".