Fuel Supply System
An electric fuel pump (located inside fuel tank) supplies fuel under pressure to fuel pressure accumulator on front TBI unit. From the accumulator, fuel is carried through a connecting tube to the pressure regulator on rear TBI unit.
Unused fuel is returned to the tank by a separate return line. The fuel pump is operated by the ECM through the fuel pump relay (located on left side of firewall).
As a back-up system, the fuel pump can also be activated by the oil pressure sender. Power to relay from battery is provided when oil pressure is above 4 psi (.3 kg/cm2 ). If pump relay malfunctions, engine could still be started after oil pressure has reached 4 psi (.3 kg/cm2 ).