What engine and what year?
Anyway, it is most probably fitted with the CIS-E injection system,
which uses a fuel distributor instead of a fuel rail.
Try to take out the fuel pump relay and jump pins 7 and 8 on the
socket, or even better connect an amperemeter (be careful, pin 8 is
always hot). This will apply power to the fuel pump, and you should
hear the fuel pump running continously. The current should be around 7
If it does not work this way, the fault is in the pump or the wiring to
If it works this way, the problem must be in the signals to the relay
or the relay itself:
- Pin 8 is always 12 volts
- Pin 9 should have 12 volts when you switch on ignition.
- Pin 12 should have 12 volts when you crank the engine.
- Pin 11 is ground
- Pin 7 is output to fuel pump
The relay energizes for a second or so when you switch on ignition. It
energizes again when you crank the engine, and finally it stays
energized once it gets normal RMM signal on pin 10 (which of course
does nor occur in your case, since the engine does not start).