Gunter, if fuel pump is only running for 2 seconds, and then shuts off, how do you explain fuel in oil? Fuel has to be pumped from tank to engine somehow. Make sure fuel pump is not running with ignition on. It should not run even for two seconds with the ign on. 1975 and earlier cars with EFI type systems ran for 2 seconds to pressure systems, CIS systems should not run at all, because the injectors will open from the fuel pump pressure and inject fuel into the engine. Check this out by turning on ignition and crawling under car and feel of fuel pump. It should not be running. If it is running, start checking power supply to pump back to source of power, after you first disconnect wire to pump to prevent filling engine with fuel.

Rob