Beeeeeping sound
 

Heya all

Ive got a Voyager LX - 2002
And it makes a beeeeping sound from the middlepart beneath the car.
Can this be the fuelpump giving up?

It does this sometimes with only the ignition on, and after driving for about an hour or so.. it varies tho.

Otherwise the car runs smooth and no other problems, just this annoying beeeeeep wich is continuous, it can suddenly stop too, just to reappear later.