Hello and thanks very much again. So helpful to get ideas and feedback.
I changed the replay/ solenoid. No difference. So not sure where to go now.
There isnt an immobiliser fitted and the diesel pump is not fan belt drive. In the phot i posted above it is the cylndrical shaped/ round thing to the left of the relay, with the 3 tubes coming from it. That all seems fine, no leaks there, nice and dry.
The best clue is that a mechanic looked at it and said there was no power getting to the fuel shut off valve, he put a wire from the positive terminal on the battery to the valve and it started! See the photos for the wire and where it goes to make the car start.
Ive checked all the fuses and they are ok.
Ive got an appointment with the auto electrician near here but its not untll the 4th Dec, nightmare. This certainly seems electricl doesnt it?
What could be the cause of the fuel shut off valve not getting power if the relay is ok and the fuses are ok?
Thanks again for your
help and ideas, so valuable!
I believe your Diesel fuel pump is belt driven via the cam belt this belt is hidden out of sight behind a plastic or metal cover.
Your auxiliary belts (fan belts) these drive the power steering, alternator, air con, both the auxiliary belts are seen in your previous post photo at the bottom.
Ok so from what you've mentioned the mechanic put a live wire to the fuel solenoid cut off valve,
and your engine started up, this does indeed look like an electrical fault.
When you switch on your ignition the fuel solenoid cut off valve should be energised from the relay possibly via your ECU,
as you have no power at the fuel solenoid cut off valve the issue is either in the wiring or relay resulting in loss of power when ignition is switched on or when cranking the engine over.
According to the wiring diagram pin 53 from the ECU is for the fuel solenoid cut off valve.
I've attached below a photo of the main fuse box layout for your Cordoba from 1993 to roughly 2002 for petrol & Diesel.
FUSES N.o //
AMPS //
FUSE FUNCTION
1) = (10amps) LH dip beam and adjuster
2) = (10amps) RH dip beam and adjuster
3) = (10amps) Number plate light
4) = (15amps) Rear screen wiper
5) = (15amps) Windscreen wash/wipe
6) = (20amps) Fresh air fan, air conditioning
7) = (10amps) RH sidelight and rear light, engine compartment lighting
8) = (10amps) LH sidelight and rear light
9) = (20amps) Heated mirrors, rear window
10) = (15amps) Front, rear fog lamps
11) = (10amps) LH main beam, warning lights
12) = (10amps) RH main beam
13) = (10amps) Horn
14) = (10amps) Reversing lights, heated seats
15) = (10amps) Engine equipment
16) = (15amps) Instrument panel, clock, interior light, lights on buzzer
17) = (10amps) Indicators
18) = (20amps) Fuel pump, lambda probe, injectors
19) = (30amps) Coolant fan unit
20) = (10amps) Brake lights
21) = (15amps) Central locking, boot light, radio
22) = (10amps) Cigarette lighter
RELAYS:
1) blank
2) Rear window wash/wipe relay
3) Power supply relay (109)
4) ‘X’ contact relay
5) blank
6) Hazard warning lights relay
7) Headlight wiper relay
8) Windscreen wash/wipe timer relay
9) Lights on warning buzzer relay
10) Fog lamps relay, or plug bridge
11) Twin tone horn relay, or plug bridge
12) Fuel pump or glow plug relay (103)
13) **blank**
14) **Central locking, with remote control (160) or relay for 2nd speed of electric fan (80)**
15) **Inlet manifold relay (1)** // **Electronic terminal box relay for diesel engine control (144)**
16) **Electric fan 2nd speed** // **Electronic terminal box relay for diesel engine control turbo diesel (166)**
17) **Diesel glow plug fuse or ABS relay (178)**
18) **ABS relay (178) or relay for double light models (145)/(200)**
19) **Central locking, with remote control (160)**
20) **Electric windows fuse (53)**
21) **Engine relay (31)/electric fan 2nd speed (53)**
22) **Automatic transmission relay (150)**
23) **Diesel glow plug relay or ABS fuse**
24) **EDS relay (79) or Automatic transmission relay (150)**
** = these relay positions may vary on diesel models.
From what I can see in your uploaded photo's and from what you've mentioned in your posts,
it does look like someone has added another relay to the far left of engine near your fuel filter,
looks like the 2mm or 2.5mm thick white wire from that relay quickly changes to a 1.5mm pink wire,
basically where the black insolating tape is seen wrapped over the joining between the thick white wire and thinner pink wire,
that might be a weak joining, broken solder, or water ingress affecting the connection between the two wires ?
That pink wire looks like it goes to the fuel solenoid cut off valve but doesn't look OEM ??
Normally I think the wire to the fuel solenoid cut off valve is (white and black) or (brown and white),
plus is neatly clipped/attached sometimes to the side of diesel fuel pump,
to
help stop it from rubbing against anything until it goes back into wiring loom.
The OEM relay for the fuel solenoid cut off valve is I think relay 109 which is number 3 in the above relay list,
this relay I think is the main power supply to the ECU including the fuel solenoid cut off valve.
Hope this helps
Si
