I can hear a loud hum from the right rear area of my E34 when it's on. Sounds identical to the fuel pumps of the '90s full-size Chevy trucks.

112k miles, not sure when the fuel filter was last changed but it's not the original. This summer it sat for three months driven about five times on 3/4 tank of Chevron premium.

Think it's a fuel pump going south? I have a 550-mile drive tomorrow and don't want to get stranded!

Help!