Fuel Door Actuator Issue- Crazy weird.
 

Good Morning Everyone!

I'm very new at this, so please forgive my explanation.

After having my back right speaker fixed, every time I turned my A4 ('06) off, I heard this faint thumping coming from the fuel door (in perfect rhythm). It would be constant, and does not stop....until I power the car on, or unlock/open the trunk.

I did some research, and found the problem to be the actuator behind the fuel door. Wellll, turns out that after I replaced that, it is still having the same issue. So maybe something electrical?

Thanks for the help guys.

To be specific, the actuator is actually working, trying to open the fuel door, motor is turning and everything.