My neighbor has a '95 legacy wagon, I replaced fuel filter, replaced dead pump, relay checked out, sending unit seemed OK. Now the fuel pump runs constantly without key in ignition, it will run battery down overnight. The car starts and runs.  Manual suggested  MAF, pressure sensor.

Has anyone had a similar issue?

Relay is the only way the pump gets power. Remove the relay and see if it shuts off. If it does either the relay is stuck on or the coil control circuit for the relay is grounded and keeping the relay on.

Edit: read op wrong.

Edited October 19, 20178 yr by Fairtax4me

screwed up relay

I had that problem with mine and it turned out to be a bad ground to the engine but my car wouldn’t start, it would turn over.

But the moment you turned the ignition off the fuel pump came on and a whole bunch of other things