TD5 running on 4 cyc's

[5xcoker]

Looking to see if anyone can point me in the correct direction.

I was heading out west (3 hr drive) from Brisbane, got 2/3 the way when the Discovery (Dec 2003) starter to vibrate and noticeably lost power,
we could still drive but you needed to be at 2500 revs or higher if you wanted any pickup.

There is no additional smoke or anything else out of the ordinary, visibly.

Looks and sounds like it's running on 4 cyc's, even at idle.

We put a bottle of injector cleaner in but it's made no difference.

I have access to a workshop but no one has Discovery experience.

So guys what do you think the problem is and what should I do?

[dmdigital]

Check the injector wiring harness for oil contamination would be the first thing.

[Psimpson7]

second that... check for oil contamination in the ecu plugs

[Scouse]

You've checked for the "oil in the injector harness" issue ?
That's the most common cause of this.

[Scouse]

Gee, I'm getting too slow at this game :(.

[Redback]

Oil in the injector loom

Fuel sensor

crank angle sensor

Faulty injector

Dirty or blocked EGR

Wastegate modulator or loose or hole in hose.

Dirty fuel or air in fuel system

Baz.

[5xcoker]

Thanks Guys will start the ball rolling with what you have given me so far.

[Sleepy]

Yup, the ol oil in the harness trick again - just had mine done! Vroooooooommmmmmmm.

Mine felt like i was running on 4 cyl too.!

[5xcoker]

Thanks for your help.

Played with the wiring harness and it came good, "for a short time"

The question is does it just need cleaning and what part in particular?

Do they ever just fail?

Thanks again.

[Psimpson7]

The fault is that the oil can get into the loom under the rocker cover. It them propogates all teh way along through the loom until it hits the ecu plugs where it messes up the signals sent by the ECU to the injectors.

It is a very common issue on TD5's

You can clean the ecu plugs out with some sort of contact cleaner and this will resolve it in the short term.

You will need to remove the rocker cover and change the injector loom (about $140 from LR)

Then if you clean out the plugs a few times and do your best to clean the oil from the main loom it should be fixed!!

This is the loom you need to change:

https://www.aulro.com/afvb/images/imported/2009/01/859.jpg

Good luck
Pete

[justinc]

An AMR6103 injector harness will rectify the original fault, but cleaning the plug at the front of the head where the loom plugs in and the ECU red plug will make it run fine again. Also, check the plugs for the MAF and AAS in the airbox lid for oil contamination. You may need to revisit these plugs and clean them again at a later stage after replacing the injector harness. If you want to ring and talk to me about it 0408 995 635 during BH I can explain a bit better as it is late, and I need my beauty sleep:p

JC

[slug_burner]

When did LR get around to producing a harness that did not take the oil into the wiring?

I thought that by the time they got to the update model this problem had been fixed.

[mousie]

Unfortunately, LR never did, its just a case of hardening plastic sleeves over the pins, the oil passes the clear/white plastic sleeves on the outerside and between the black coupling.

http://www.aulro.com/afvb/technical-chatter/57531-td5-injector-loom-cheap-fix-once-all.html

I hope this helps. I've completed 12 of these now with 5, first mine in service and backups from a few mates (who had a few mates hi hi) that didn't throw theirs out. At least I found out LR owners don't throw stuff away hi hi.