I had just noticed that the previous owner had bared the 'Black' wire going onto the ECU (red connector) and I am concerned that they were up to something there - no idea what they were doing or hoping for - any ideas? Its intact though - looks like they may have been trying to bypass something???
 
Well, if it's just stripped back it should still be doing its job.

The fact that it's the black one is interesting. That's earth, and apparently there are four earth pins in the black connector. I don't know if there are four black wires matching those, but I see two on some diagrams. How many do you have, and are they all stripped?

Bearing in mind that I guessed bad earth I can't help wondering if someone else thought the same and was trying to improve it.

Also apparently, one black should go to an earth point in the seat box, and be joined there by a black coming from the OBD socket. The other goes to the EGR modulator.

I don't think this is much help in diagnosing but does possibly show that this has been an ongoing problem.
 
I had similar issue to this. I changed injector harness and all bits you have. Mine would feel like it hit fuel cut and would hesitate or kangaroo.
Eventually, it died on the m4 in the rain. No one could work it out. I rewired the throttle inside the cab and it was cured. For the sake of what this costs to do id do it if you can’t work out what’s wrong. It’ll then future proof it anyway. If i ever bought another td5 defender it would be first thing I did. Crispy crappy loom around gearbox tunnel etc.
 
boguing said:
Well, if it's just stripped back it should still be doing its job.

The fact that it's the black one is interesting. That's earth, and apparently there are four earth pins in the black connector. I don't know if there are four black wires matching those, but I see two on some diagrams. How many do you have, and are they all stripped?

Bearing in mind that I guessed bad earth I can't help wondering if someone else thought the same and was trying to improve it.

Also apparently, one black should go to an earth point in the seat box, and be joined there by a black coming from the OBD socket. The other goes to the EGR modulator.

I don't think this is much help in diagnosing but does possibly show that this has been an ongoing problem.
Click to expand...

Just the one into that connector and its the same gauge as the earthed one to the chassis underneath the ECU. Its worrying though.....what were they up to???
 
tweedandbriar said:
Just the one into that connector and its the same gauge as the earthed one to the chassis underneath the ECU. Its worrying though.....what were they up to???
Click to expand...
I think it might be worth cleaning up that earth point, but if it looks ok when it's apart, it's probably ok.

Failing that I'm afraid I'd break my own rule and follow @resto_d1's plan.
 
boguing said:
I think it might be worth cleaning up that earth point, but if it looks ok when it's apart, it's probably ok.

Failing that I'm afraid I'd break my own rule and follow @resto_d1's plan.
Click to expand...

Thats - yeah, I am thinking of replacing the wiring loom from the throttle to the ECU.... another fooking £60, not much, but it all adds up eh!
 
Scrub what I just wrote. Try the loom. Because it was touching 6v I don't think the pedal potentiometer is the culprit.
 
Last edited:
Evening!

Earlier, I hooked up the Nanocom and saw that the throttle was set to a 3 track. So far as I know my 1999 110 (10p) is a 2 track pedal. I reset it to 2 track. I've not gone any further than back from my local after a pint or two of Tribute (Cornish best!!), so can't really report back as yet, it's only a half a mile drive. What dya think, would this make much difference?
 
It shouldn't make any difference.

If it did then either track 3 is damaged (which I doubt - because it jumps to 6v when it's only supplied with 5) or the wire for track 3 is damaged, which again I doubt because of the 6v.

Go for a longer drive!
 
boguing said:
It shouldn't make any difference.

If it did then either track 3 is damaged (which I doubt - because it jumps to 6v when it's only supplied with 5) or the wire for track 3 is damaged, which again I doubt because of the 6v.

Go for a longer drive!
Click to expand...

I'll find a pub a bit further away then, yeah? 😁
 
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