In my car on the fuel line that comes from the fuel filter to the fuel pump of the car, there is an electric fuel pump that was installed manually on the pipe!
Does anyone have a clue what that could be for?
It doesn’t look like a thing that the manufacturer would do, but rather it seems to have been done by some mechanic somewhere for the previous owners.
It is also not even mentioned in the Haynes book of the car.
I tried to open the output side of that pump and it indeed pushes fuel into the pile that leads to the "real" diesel pump.
If you have such in your car or may know what that is for, please let me know.