Good evening everybody

Im a new member posting from Oman (near Dubai)..

I've been refurbishing my 280z model 77 but when I crancked the engine I came 2 know that It is no longer serviceble!!

I have everything hooked up, but have no power to the injectors. I checked my fuses, fine. Checked the pump via external power, fine. I checked the wires going back to the fuel pump, no juice. I did a continuity check, no power. I did a check on amost every wire I could trace. Nothing!!

When I tried to give power to the injectors directly from an external power, they worked and the car worked for almost 2seconds but I know this way is not proper..

Im assuming that the Fuel pump relay is the issue but I couldn't find a new one n market down here!!

GUYS Help me please!!

What do you think the problem is??

If the fuel pump relay is the prob. Any other cars FPR suggested for my fairlady??

Did you check the efi fusible link from the batter +pos to the fire wall area.

Trace the power from the battery.

You can get the wiring diagram here http://www.atlanticz.ca/zclub/techtips/wiringdiagrams/F77ZCAR-WIRING1.pdf

Here is the factory service manual: http://www.xenons30.com/files/FSM/77_datsun_280z.zip

While you are visiting the xenons website, download the fuel injection supplement. Its inthe "Other" sections futher down the page. It has a great trouble shooting guide.

Good luck

Chas

Thanks folks 4 the usefull advice

But still no update!!!

I installed my car ECU AND FUEL INJECTION RELAY in my friend's car and his car worked fine!!!

Why dont they work on my car??

Does the distributor have anything to do with the injectors current??

What makes the injectors work? I know that ECU does, but I mean what item/tool gives the ECU the order to send current to the injectors to work?

  Omani said:

when I crancked the engine I came 2 know that It is no longer serviceble!!

I did a continuity check, no power.

Continuity is used to check if two points are connected. It does not tell you if there is power.

The distributor and ignition module are involved in the injectors' opening and closing. The ECU is connected to the coil via a blue wire to the negative terminal of the coil. This wire also connects to the ignition module. The ECU opens the injectors every three sparks. The ECU also needs to have the tachometer connected to work correctly. I believe that it may be part of a pull-up resistor circuit, but that doesn't really matter. Make sure that the blue wire from the coil negative has continuity to Pin #1 of the ECU at the connector, and that it is connected to the ignition module, and that the tachometer is connected properly.

The fact that the engine ran for a little while implies that you have power to the fuel pump. You can check that by removing the small wire from the starter solenoid and turning the key to Start. The engine won't turn over but the fuel pump should run.