Hi Dave,
As far as i know the low pressure electric pump in the tank is not supposed to be there !! or at least the ECM software should be programmed not to power it.
Autodata says to disconnect he fuel relay for the following engine ECM's
:- F9Q-760, 82 00 325 719/82 00 389 519/82 00 380 647 (GEX)
:- F9Q-762, 82 00 325 720/82 00 391 179
:- F9Q-730, 82 00 355 236
The pump running continously causes rattling engine at idle !
Denis