WONT START !!!

[tonyvan]

PUT THE NOBLE AWAY LAST SUNDAY AFTER A GOOD MORNING AT GOODWOOD SUPERCAR SUNDAY.WENT TO START THE OLD GIRL THIS MORNING TO GOT TO A CHARITY EVENT,AND THE FUEL PUMP WOULDNT BUZZ IN. TRIED CLEANING ALL 4 FUSES JUST ABOVE ECU, AND CHECK NONE WERE BLOWN. USED SOME WD40 ON THEM, AND ALSO ON THE BANK OF RELAYS ON THE BULKHEAD,BUT STILL NO JOY. THERE APPEARS TO BE POWER AT THE 2ND FUSE, 20 AMP ...NO VOLTAGE SHOWING AT THE FUEL PUMP WITH IGNITION ON.
ANY IDEAS IF THERE IS A RELAY OR HIDDEN FUSE SOMEWHERE IVE MISSED. I DONT THINK ITS THE IMMOBILISER.
THANKS
Tony

[tonyvan]

That 80amp fuse is ok. there is voltage there. Some of the other fuses, click sensors on the engine when removed. Ignition light is on, but just no power to the fuel pump from what the multi meter reads, plus as its a high capacity fuel pump Bosch 400 which buzzes like a bh. Are there any fuel pump related relays or fuses on the passenger side footwell, or anywhere else ?

[tonyvan]

Thanks for the help guys. Yes there is a relay that is fitted on the cross section chassis, I don't recall seing another inline fuse but I will check. All contacts to the fuel pump are secure as I took them off to see if there was voltage at the terminals and also to fuel pump while it was isolated. Hoping it's a simple fix. Appreciate all ur input. Just to add, yes it does have the upgrade wiring for the fuel pump.
Tony

Edited by tonyvan on Monday 11th June 11:56

[tonyvan]

Thanks guys for all ur help I won't be able to get to the car for a few days, but I will check the relay near the fuel pump and also see if there is voltage at tbat relay. Fingers crossed its not the Ecu as it will be pick ur price mr noble lol

[tonyvan]

Checked this eve and there is voltage to the relay near pump. Took it to halfords to match, but the relay I have is 12v 70 amp and they only has 12v 30 amp and two of the spade connectors are a lot smaller, so I will try a motor factors tommorow. Hoping it is just that relay.

[tonyvan]

Update took relay for the fuel jump to auto electrician who said the relay isn't switching in. Have to wait till Monday for a new relay to be ordered as its 70amp heavy duty one and not in stock anywhere local.fingers crossed that will cure the problem.

[tonyvan]

Thanks guys for all ur help got round to fitting new fuel Pump relay and alls good, the old girl started up. £12 fix lol