When I hit the ignition in my 84 vanagon, it starts right up.
After 3 seconds or so I hear a constant hum that never
goes away and never varies under any conditions until
the motor stops running.  I assume this is my fuel
pump.  Sure sounds like it is in that area.  Is this what
happens when fuel pumps start to cavitate?  If I ignore
it, will it give me some warning before it just quits?

Thanks for any help!

Steve E
84 vanagon
Lansing Michigan