Holden VR won't start!!!

[nekzuu]

Hey guys,

This is my first post to the forums and before I do so, I'd just like to say hey hey

Anyway back to the point, I've recently picked up a '94 Holden VR Exec which wouldn't start due to the fact no fuel was travelling through the lines to the engine, and after a bit of digging around the ins and outs of the car and checking relays, fuses, wiring, power to the fuel pump etc I originally thought it was the fuel pump that had carked itself over the years, so I went out and got myself a brand new fuel pump and fuel filter in hopes the car would start. But my hopes were shattered once I cranked the car and no fuel was still coming through the lines (smh)

Before I installed the fuel pump I made sure to check whether there was power getting to the fuel pump (which there was), but every time the car is put into accessories and I go to crank it the fuel pump doesn't want to whir! I tried bridging the connection (87 & 30) to see if the fuel pump would run with manual power and guess what, no luck.

The only thing I can put my finger on right now is that my relay/fuse rail in the engine bay has poor wiring and its s*** itself, but I thought I'd get some second opinions since I really want my baby to start.

Any help would be much appreciated boys and girls

 

[nekzuu]

UPDATE:

Thought I would check if there's power in the relay itself (Pin 87 & 30), pin 87 has constant power and pin 30 has no power whatsoever, even when being cranked.

I'm assuming it's the ECU not allowing the relay to turn on?

 

[losh1971]

Does the engine crank over? If no then I have a pretty good idea what it might be.

 

[nekzuu]

Does the engine crank over? If no then I have a pretty good idea what it might be.

Yeah engine cranks over and wants to start, but just can't do it without any fuel pressure/fuel pump power hahaha

 

[wildfiremaint]

Hi nekzuu, If you bridge 87 and 30 in the relay socket as you said
above then the pump should run as you have 12V on 87.
I would check for 12V at the plug at the tank with the relay socket
bridged. Sounds like open circuit in that wire to the tank.
Also should check that you have a good ground at the tank for the
fuel pump connection.

 

[losh1971]

Could be the crank sensor

 

[BlackVXGTS]

Is your engine light on? Have you checked your error codes? Instructions in link below:

https://forums.justcommodores.com.au/threads/checking-error-codes-vr-vs-revised.22307/

 

[wildfiremaint]

The fuel pump should prime for 2 seconds when you turn the key
to reds. Fuel pressure must be there before you even crank it.
As before - check 12V and ground at fuel pump connector at tank.
The fuel pump needs both 12V and ground to operate.

 

[wildfiremaint]

Did you fix it ?
If so let us all into the secret .

 

[nekzuu]

After breaking my back day in day out, found out the wiring in my fuel sender/assembly has corroded and isn't allowing any power through, even when given direct power from the battery hitting up pick a part tomorrow and hopefully all goes well, will keep you guys updated!