Oil in Ecu box ???

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Originally Posted by CraigE

While oil is not widely known as a conductor it will conduct enough to cause interuption in the injector firing sequence. Just ask any good engineer.

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Thanks :) but I dunno any good engineers:( to ask - hence the question on AULRO:) .

I thought a lot of high tension insulators were oil filled because of their insulating characteristics.

Gazzz

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Originally Posted by garrycol

Thanks :) but I dunno any good engineers:( to ask - hence the question on AULRO:) .

I thought a lot of high tension insulators were oil filled because of their insulating characteristics.

Gazzz

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The oil in HT insulators is there to disepate heat.

On a few plants I have seen (large 3ph systems) they use oil as a 'resistor' to iron out peaks / spikes in power supplies- different oils have a different 'resistance' - most oils will act as a conductor to a certain degree

I just carried out a very basic 'test'

I poured a little Magnatec engine oil in a container, and put the negative clamp of the battery charger in one end.

I connected the poss clamp to my multi-meter poss probe, and then popped the negative probe into the oil away from the submersed clamp.

The meter read 0.20 volts.

The voltage from the battery charger is 11.90v

So the 0.20 v relates to 1.68%

Now at the moment I don't know if it's a sliding scale or a relative curve (ie as the volts in increase the volts out via the oil would increase by the same proportion or not - but I'll assume so, I'll do another test later with 24v in)

The injectors on a TD5 work on 85 volts - so 2% = 1.7 volts

1.7 volts would certainly be enough to upset most electronics in the box.

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Originally Posted by ladas

I just carried out a very basic 'test'

I poured a little Magnatec engine oil in a container, and put the negative clamp of the battery charger in one end.

I connected the poss clamp to my multi-meter poss probe, and then popped the negative probe into the oil away from the submersed clamp.

The meter read 0.20 volts.

The voltage from the battery charger is 11.90v

So the 0.20 v relates to 1.68%

Now at the moment I don't know if it's a sliding scale or a relative curve (ie as the volts in increase the volts out via the oil would increase by the same proportion or not - but I'll assume so, I'll do another test later with 24v in)

The injectors on a TD5 work on 85 volts - so 2% = 1.7 volts

1.7 volts would certainly be enough to upset most electronics in the box.

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stop mucking around a find a fix to this oil in harness problem, its important now cos I've got it.:( :p :D

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Originally Posted by crump

stop mucking around a find a fix to this oil in harness problem, its important now cos I've got it.:( :p :D

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Crump I have a 'kit' I have made, which consists of a project box two connector strips, and 7 strands of ceramic wire (thanks to Dave's idea)

.............however

On the other thread(s) I have asked for a voulenteer, as I don't run a TD and to date nobody has come forward - so I have no idea if it will work or not, but it should

If you want to be the guinea pig

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Originally Posted by ladas

Crump I have a 'kit' I have made, which consists of a project box two connector strips, and 7 strands of ceramic wire (thats to Dave's idea)

.............however

On the other thread(s) I have asked for a voulenteer, as I don't run a TD and to date nobody has come forward - so I have no idea if it will work or not, but it should

If you want to be the guinee pig

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can an idiot install it? I havnt got the oil in the ECU yet, but it is in the injector harness, havnt got round to following it back to the junction or whatever it is, and still trying to get my head around taking the rocker cover off, so is this kit thingo easy to fit and how will we know if it works?
Happy to be a guinea pig as long as its not going to stuff the motor or something.

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Originally Posted by crump

can an idiot install it? I havnt got the oil in the ECU yet, but it is in the injector harness, havnt got round to following it back to the junction or whatever it is, and still trying to get my head around taking the rocker cover off, so is this kit thingo easy to fit and how will we know if it works?
Happy to be a guinea pig as long as its not going to stuff the motor or something.

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Basically it means cutting the 7 individual wires in the injector loom about 3 inches from the connector on the rocker (external to rocker) connecting the 7 wires into 7 connections, and connection the other end of the cut wires into the opposite end of project box,

Then just mount the project box - make up a bracket, use cable ties - somewhere - trying to keep it secure.

There is a drain hole in the box, where you could fit a plastic tube, to drain the oil to a suitable place/position.

That's it

Can not see any reason why it would interfere with normal running - as the signals are 0v and 0v - 85v

Sketch (very basic) attached

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Originally Posted by crump

can an idiot install it? I havnt got the oil in the ECU yet, but it is in the injector harness, havnt got round to following it back to the junction or whatever it is, and still trying to get my head around taking the rocker cover off, so is this kit thingo easy to fit and how will we know if it works?
Happy to be a guinea pig as long as its not going to stuff the motor or something.

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How will you know if it works, well there may be oil on the incomming connections - but on the outgoing it should be clear, long way before it gets to the ecu

so worst case scenario, I'd be up for a new injector loom? How are the connections made, solder, clips etc??

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Originally Posted by crump

so worst case scenario, I'd be up for a new injector loom? How are the connections made, solder, clips etc??

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Screw terminals - easy enough -

Worse case senario - you just solder the cable back together