A previous owner installed a 'fuel primer' button on the dash of my 82 vangon.  You push it and hear the wine of the pump and then a bit of a gurggle and then you let go of the button and start the engine and it starts fine.  If you don't push the button it takes a loooong time to get it to start.  So your asking, what's the problem?

The problem is, why does it now need a button to start the fuel pump to get the fuel up to pressure and it didn't when the vehicle was new?  BTW it has a GD000861 engine, or an early 2.0L found in the 76-78 BUS.  Perhaps they had fuel pump prime buttons in 76???

My purpose is to find and fix the original problem that caused someone to install a fuel priming switch.

Thanks,
David