Another injector harness question.

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brianconwy

Well-Known Member
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1,112
Location
conwy, north wales
Sorry I have looked through lots of posts. Its been running a bit rough lately and the Lynx shows it rough on around three cylinders. I have checked the red connector at the ECU and there is oil at the plug. i have ordered a harness and rocker cover gasket from jgs. I did spray a little brake cleaner into the plug and socket and used an airline to clear what I could.

I have a tin of isopropyl alcohol in the garage but its not an aerosol spray. Is this suitable for use and is it ok using an airline? I don't want to open the ECU unless the problem doesn't clear.
 
No probs with isopropyl alcohol as long as you are sure it's dried out completely before you power up the ECU, as about the harness if it was anything else than Genuine LR it's sh*t
 
IPA is a good degreaser and should be suitable for the job you want to do. There should be no problems with application using a soft brush such as a clean paintbrush. Ease out the white insert from the red plug to clean inside there too. IPA shouldn't attack the plastic of the plug.
The use of an airline shouldn't present any problems when applied to the red plug, but I would be more careful when applying it to the ECU side, There used to be warnings in the electronics trade regarding the build-up of static electricity from the high speed movement of the air.
The usual safety advice applies, use in a well ventilated place, wear eye protection in case of splashes and also wear some nitrile or latex gloves, IPA can very quickly remove the natural oils from the skin.
 
I have decided not to get the landrover genuine one as when I have looked at lots of other posts the alternatives seem to have done ok for people that have used them. Perhaps I should have got a genuine rocker cover gasket but for one third of the price I will try the aftermarket one. I can always change it later. Its not as if Land rover are renowned for their build quality in the first place. Its cleaning up the ECU and loom that has been worrying me the most. I will try the IPA and keep checking the red plug and the plug at the other end.
Thanks
 
Then I will send it back under warranty. But for twenty pounds it is worth the gamble. There may be cases of genuine ones failing. Do they really use o-rings of such a lower standard?
 
It's not only about the o-rings, the ingress starts from the connectors which are plugged to the injectors also the cheap ones have weak terminals there which can affect the PWM for the injector's controll
 
sierrafery said:
Aftermarket loom will most probably leak in less than 1 year, i've seen cases with 3 and 6 months after replacement
Click to expand...

I put a Bearmach one on my D2 a year ago and the oil continued to leak to the red ECU plug until I swapped the loom for a genuine one about a month ago.

Although I have not tried them yet, the Allmakes PR2 injector looms appear to use the same connectors and seals as genuine LR.
 
It's just worth noting that the LR harnesses were the origin of this problem, I.e. the factory fitted harness on the new vehicles wicked the oil down into the ECU
 
Yes but not after 3 months like the cheap ones do, according to some sources they tried to improve things in time even though they didnt succede
 
I connected up the Lynx and the levels of rough running in the cylinders has improved with just clearing the oil at the connector so when the new harness is fitted the problem should be solved.
 
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