Fuel pump noise - bad?

[noid]

http://www.youtube.com/watch?v=GSrQ-JRIP0w&list=UUfoHkld9SbdjtB-8UJVuDjw&index=1&feature=plcp

Normal or Dieing fuel pump?

E30 is an 87 January production with the 2 pump system.

[jlevie]

Unless you had a jumper in the fuel pump relay socket, something is wrong as the pump should only run when the DME sees timing data from a rotating engine.

The pump should not be that loud. It will make noise if there is an obstruction in the rail supply or return lines (clogged filter, obstructed line) or if the transfer pump on an early car is bad (or the the line to the high pressure pump is obstructed). If the pumps are good and the system is operating properly you should just barely hear a hum from the pumps if you jumper the relay socket and you should not be able to hear the pumps at all over an idling engine.

[dnguyen1963]

Get yourself a new pump. That sound means your pump is not very happy. It is working very hard. Something is blocking the outlet or the bearing is going bad. BTW, the pump should not be on when the engine is off (I did not hear the car running in the video).

[noid]

Car was on while I took the video.

[jlevie]

In which case the pump is way too noisy. I could not hear the engine above the nose from the pump.

[dnguyen1963]

^ this.