It most likely should pulse but the direction of the Fuel Pulse should only be one way. If it is pulsing back towards the Fuel Tank there could be an issue with the valves inside.

There is a Valve kit for the Fuel Supply/Lift Pumps.
I am not sure which kit yours will need but if the Pump has Disc Valves in order to get the Disc Valve out and into the Outlet Fitting a crimp needs to be ground off. There is a good thread on that in the DIY section.

__________________
84 300D, 82 Volvo 244Gl Diesel