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Tompoole

Member Since: 05 Jun 2011
Location: Bucks
Posts: 822

Oil in red conector

Hi
Need advice, if a td5 has the oil on red ecu conector causing it to not start ,should you replace engine harness
As well as injector loom? I’ve cleaned ecu and red connector and engine starts but after being
Left over night she refuses to start again so need to reclean ecu and conector.....
Also there is oil in seat box so guess engine harness must be soaked in oil .
Thanks in advance Have fun be happy

1st Nov 2017 8:59am

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5736

1999 Defender 110 Td5 SW Caledonian Blue

I would start by replacing the injector harness. Clean up the old oil. You might still find oil escaping for a week or so after replacing the injector loom and then go from there.

There should (in my experience) only be oil on the red plug. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

1st Nov 2017 9:02am

roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

The oil comes along the injector wires to the red plug and without checking I thought 4 of the 5 are on the left side off the plug. So if you could tilt your Ecu with the plug down and rights side a little upwards you might have less problems as the oil will only partly cover the other connections.

The egine loom will keep on dripping oil for weeks but it will get less and less. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

1st Nov 2017 9:29am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16855

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

WIth my Disco 2 when this happened I replaced the injector harness only (sealing the new one properly before fitting it) and cleaned the red plug thoroughly with brake cleaner. I also found that I had oil inside the ecu, so that also got the (careful) brake cleaner treatment.

I then checked and cleaned the red connector about once a week until it stayed clean, and after about 4 weeks the oil had drained out of the harness and it stopped oozing.

That was at least 10 years and about 100,000 miles ago and I have had any trouble since.

1st Nov 2017 9:40am

roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

I had mine is 2009 and no problems since either. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

1st Nov 2017 9:55am

Tompoole

Member Since: 05 Jun 2011
Location: Bucks
Posts: 822

Cheers people
Cleaned again but to be fair wasn’t that mucky....... found starting issue had nowt
To do with ecu loom or harness it was simply relay issue Have fun be happy

1st Nov 2017 10:16am

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