I had a similiar problem on a 560sl, the ignition ezl , sends a voltage to the fuel pump relay and then the relay in turn will keep pumps running after cranking and running, after i diagnosed that, a good ezl ignition allowed power to the pumps, you need to get the wiring diagram for your car and see if thats the issue, in your case if you jumpered the fuel pumps at relay and the pumps run the car should start, if it starts jumpered but not with relay plugged in you need more testing, hope that helps