Thread: Td5 Disco 2a acting up - Fuel delivery problem?

I had very similar issues with my Defender TD5 and the culprit turned out to be the little one way valve in the head of the fuel filter unit. It is a fairly cheap part and takes little time to change.

woko
Master
Subscriber













Join Date: Oct 2009
Location: Hunter Valley
Posts: 776
Thanks: 57
Thanked 308 Times in 262 Posts








Quote:



When the repairs done you should do this Mod. This come from LR Tech support after I had a 03 disco doing the same thing but without the total engine failure but took LR tech some time to come to this. They wanted injectors changed, no change. New head with another set of injectors, No change. Long motor with another set of injectors, No change. Then they wanted this mod done, it still leaked from the plungers of the injectors but had dramatically reduced, Had fuel pump running for 12hrs and the injector tops were damp. before the head was full of fuel. So I highly recommend it.

On the fuel filter housing, the front pipe closest to chassis, remove the fitting from housing.
On the end of the fitting there is a rubber check valve. remove the check valve from fitting and then separate rubber tip from plastic end.
You will notice the hole through the plastic reduces drill this out to the same size. I think from memory it is a 1/8 but check.
Reassemble Job done
This is the return line from the engine and reduces the return line pressure. It slows the diesel ingress into engine.
I check oil level on TD5's before servicing and it is surprising how many fill the sump. Its more common on the later Td5's with green injectors.






Remember reading this sometime ago, might be of some help.


Tiger

Hi all.

So I tried drilling out that plastic piece (thanks Woko)

Should the fix be instantaneous?

I have started it probably 15 times since I drilled it out and it has only struggled a few times. It also feels like it isn't struggling as much when it does struggle. This seems to be an improvement, but it may be confirmation bias.

Any other suggestions?

Thanks.

Very interesting. I have a similar fault condition when the engine almost starts but I let go of the key too early. I have to let it sit of a few minutes before it starts like nothing ever happened.

... I hold my foot on the accelerator and just leave the key turning the engine over and over ...

Don't do that as long as the engine didnt run out of fuel cos you might flood it, as long as there was no intervention on the fuel delivery system there's no need to touch the throttle whatsoever, also if it doesnt start right away without any throttle after a 5 pedal purge sequence better check the compression

Hi.

If the engine compression is bad then surely I would have other symptoms?

Or do you mean fuel system compression?

The fact that it is worse when low fuel would indicate it is a fuel system issue?

I have put a tank of diesel in it recently and have not had any starting issues (although fuel level still quite high).

Cheers.

I meant engine compression though if it's fuel level related remove the tank's cap next time when it makes tricks and if it starts easyer check that pipe from the attachment cos it used to choke at the pointed section and one of the symptoms is hard start at low fuel

Hi mate.

Cheers for the info.

I have actually replaced that piece of hose and it did correct my issue for about 12 months.

Now I am having the same issue; I suppose I ought check that hose again?

I ended up replacing the kinked piece of the hose with some braided hose and I am sure that the braided hose hasn't kinked...Maybe it has kinked elsewhere?

How would I go about replacing that hose anyway?

What is the cause of this kinking problem?

Thanks all.