V12 fuel pump problem ?

[johnxjsc1985]

I have been repairing and restoring a Cabbie 1985 and need to get it mobile .It fires up with a dose of easy start but I cant get fuel upto the fuel rail.
If I disconnect the fuel pump lines and connect the pump to a battery it pumps fine but soon as I put the fuel lines back on even when connected direct to a battery nothing happens. Is this just a straightforward pump swap?

[WDRV12]

Sounds a bit odd that if you run the pump direct to the battery it will still not work . You have 2 relays in the boot on the RHS at the top of the tank by the ECU check you have power when cranking . If it fails when the engine tries to start then then it will be possibly ecu signal lost. Do the injectors click when you crank the engine ??

[johnxjsc1985]

I am going to send the ECU of for testing the relays click ok so I am kind of going down the ECU route as it is one i picked up untested from EBAY.

[johnxjsc1985]

By Powering up the fuel pump there was plenty of fuel circulating around the fuel rail but no sign of her firing up.

[WDRV12]

Sounds like you have lost signal from the distributor ! Possibly amplifier on top of b bank manifold can cause ! Do you have a good spark ??