EFI V8 14CUX not cranking - solved

Hi all,

I have a 110 with a build in 3.9 EFI, (Z gearbox).
After parking the car 2months ago I did not use it, now I try to crank it but it wont turn.

With help of the range rover 1992 14cux diagnose manual I try to get everything tested but now im lost.

so far done:
1. Battery check, was empty but now full again (y)
2. Manual starter engine via + cable at relay, starter engine turns but with key at position 2 not firing up (only start sound of fuel pump)
3. Relay tested, is ok.
4. Fuel pump is ok in position 2 and starts briefly waiting for signal of rotating engine afterwards.
5. Relais - signal is active when gearbox in P or N, when not in that position not active.
6. + key position 3, no signal at relays +
7. + key 3, no signal at ECU position 39, seems a bit of a different connector then shown in maunal, a bit more round not so square at picture, however same amount of pins.

I expect cable between key/ignition and ECU, however car is not starting when manually cranking at the relay. Or is this normal?

Help is welcome...

id check inhibitor switch on gearbox and its connector to the loom on top of bell housing, you can link the 2 wires at the connector that cuts out the starter

that was my idea, while checking the relay in the car, when changing gear it shifts the negative connection, so when in P or N earth is connected to the relay, as I understand, it does more and can block the ECU separately?

dvollebregt said:

that was my idea, while checking the relay in the car, when changing gear it shifts the negative connection, so when in P or N earth is connected to the relay, as I understand, it does more and can block the ECU separately?

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the starter circuit is separate from the efi apart from immobiliser will effect both

jamesmartin said:

the starter circuit is separate from the efi apart from immobiliser will effect both

Click to expand...

Thanks! I will check asap!

Hi James,

Is it this connector? Or is it really two cables, these are 4 cables? How to link it through?

Thanks

dvollebregt said:

Hi James,

Is it this connector? Or is it really two cables, these are 4 cables? How to link it through?

Thanks

Click to expand...

yes 2 wires are reverse light(green) the other 2 need joining if it turns over its the switch

jamesmartin said:

yes 2 wires are reverse light(green) the other 2 need joining if it turns over its the switch

Click to expand...

I just tried connecting no effect when ingniting the car...

dvollebregt said:

I just tried connecting no effect when ingniting the car...

Click to expand...

whats your actual symptoms

no cranking with key in position 3
and if manually overwriting relay in the car it does not ignite

dvollebregt said:

no cranking with key in position 3
and if manually overwriting relay in the car it does not ignite

Click to expand...

I think i found it, cranking was blocked by old relays (hidden behind breaker board), seems they are corroded. I will get some and let you know.

dvollebregt said:

I think i found it, cranking was blocked by old relays (hidden behind breaker board), seems they are corroded. I will get some and let you know.

Click to expand...

It cranks again, so first issue solved! Now it does not start, so what more did the corrosion do.... This topic closed!

Result