Discodevon

Well-Known Member
Hi guys

Just wondering if anyone has seen or had issues with the harness without the ecu red plug being oiled up... Perhaps just getting old and brittle inside the engine sort of thing?
 
Any conductor can fail due to corrosion, water ingress fractures etc..so to tell you if yours failed or what caused it will be a shot in the dark. Best thing is to do electrical tests on it, tracing it from where it has power to the connectors individually.
 
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Our 2003 TD5 suddenly started running on four cylinders.
There was no oil at the ECU red plug.
l changed the injector harness and it cured the fault immediately.
 
That's interesting... I was looking online yesterday and saw a couple people had running problems and didn't have oil on the ecu or in the head plug... But a new one cured it so it had me thinking it's probably good to replace every few years... Does anyone advise which one to get as genuine is very expensive where as oem is half the price?
 
With the Defender, the ECU is quite a long way from the cylinder head (unlike the Discovery) so it would take a lot of oil leakage over a long period of time to get there. Mostly, when mine are about to go, I see oil on the multiplug at the front of the cylinder head. Even better, when this is beginning to happen, a Nanocom might show you a 'peak charge long' error.
 

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