WTF! oil at ecu plug?

[monkey3]

Just about to fit my lovely new Thor VFCC and pulled off the plug to the ecu to find it a wee bit oily, and I'm not talking screw or bolt lube oil, I'm talking engine type oil.

What's going on?

:wtf:

Could oil be coming down an oil pressure sender wire?
I couldn't see a boost pipe to the ecu.

Anyone had the same thing?

:help:

[Jake]

Is it definitely oil or could it be dirty coolant leaking from the heater matix?

[monkey3]

It looks like oil, and it smells like oil.
It only seems to be around the plugs at the ecu.
I'll try take a picture...

[monkey3]

I have taken some photos and they look crap, but it's definately oil... I think

[Matt 6]

Currant can carry oil down a wiring loom!!

Trust me, I have just fitted a complete front to rear side to side wiring loom into a Merc ML350 because the gearbox had a leak at the multi plug on the side and it had gone all the way back to the gearbox ECU and then leaked all over the interior carpets!!! Not nice.

Merc's suffer with the same sort of fault on SLK and C Class with 4 cylinder engines, but on the engine ECU. The leak is at the VVT Soleniod and goes all the way back through the loom, flooding the ECU and several other engine sensors/components.

Check other multi plugs on the engine for oil in them, once this is found replce the sensor/component ideally. If it isn;t too bad then a good clean out should work.

[veilsideTT]

Ive seen this on Discovery Series 2's quite a few times.

Oil travels around the main loom from the rocker (as part of the the loom goes into the rocker cover to the injectors on them)

In the end it gets back to the ECU and then they start to run like shit and have Non start issues.

I think on the discovery its either a breather issue or a loom fault. They always replace the loom anyhow as even after cleaning the connectors up they come back after a few weeks with the same faults

Very strange but ill back Matt 6 up by agreeing oil can travel around a wiring loom.

[Steviekid]

My car knackered up last year because the ECU was full of water!! I checked the footwells under the carpets about every couple of days after I finally found a replacement but never found a drop since and still don't know where it came from.

[Ian C]

My god an obscure electrical problem I haven't had :blink:

-Ian

[veilsideTT]

My god an obscure electrical problem I haven't had :blink:

-Ian
Rephrase!

My god an obscure electrical problem I dont want :blink:

-Ian

[Ian C]

I didn't bloody want any of them i can assure you :p

[monkey3]

Does anyone know where all the oil sender units are?
temp, pressure, etc.?

Just so as I know where to start.