111R rebuild

[Shug]

Mike - odd one, but there's no chance that the signal cable for the sensor is sitting too close to a coil and getting interference? Assuming the loom isn't routed properly yet, ignore if it is.

[Mikie711]

There is a possibility that it is knackered but because initially it fires then cuts out I don't think it is that. The switch hasn't popped but will try jumpering it out just to rule it out. Beginning to think it might be something to do with the way the ECU is configured. Will need to check the wiring diagram for the later cars that have can bus wiring.
As far as I can see there is nothing wrong with the sensor or the wiring, pulled the engine loom plug apart and check the wiring continuity last night. Have also remove the stack unit in case it was an incompatibility between it and the new ECU but not that either. Checked and double checked all the wiring and also changed the crank position sensor as well as the cam sensor for different ones and still no change.
Going to try different injectors just to rule them out as the impedance of the ones I have is 12 ohms and they are supposed to be 13.4 - 14.2 ohms. That said the ones that came off the car originally were 12 ohms (ish) as well so doubt it's that.

To be fair this bit was always going to be a bid of a gamble and I would have been surprised if we managed to get the ECU configured at the first attempt as it's not really a stock map. 260 maps were written for the later cars with Can Bus were as mine is really a drive by wire '06-07 model year which doesn't have can bus, wiring wise. What difference that will make we were never sure of.
Just unfortunate with the timing of it all as Craig is on holiday for a fortnight and will probably need him to talk to the factory guys that configured this ECU to get to the bottom of the problem.

Shug, kinda constrained by the loom itself when it comes to the routing but it is all where it's supposed to be, no choice really. Doesn't look like it is running to close to anything although it is pretty close to No4 cylinder injector as it is right beside it on the engine.

[robin]

Mike if you have links to the wiring diagrams for the various model years I would be happy to cast an eye over the cam position sensor stuff to see if there are differences that might matter.

Cheers,
Robin

[robin]

BTW, what happens when you disconnect the cam position sensor totally (i.e. it's open circuit) - does the engine still catch and stall or does it not catch at all - if the latter then the signal is being corrupted/going out of range when the engine is running - if the former then the P0340 could be a red herring and the real issue is something else.

Cheers,
Robin

[robin]

P.P.S. How confident are you that your cams are timed properly?

[Mikie711]

The engine ran fine prior to all the changes so no reason to suspect anything other than an electrical problem. I am now wondering if it isn't a engine fault but an imobiliser problem and that the P0340 code is indeed a red herring. There is a mysterious black box in the car that doesn't appear on any of the parts lists. It's connected tot the imobiliser and doesn't look factory fitted, will post a picture of it.
As for the wiring diagrams, I have them in PDF if you want a look see.

[Dominic]

The engine ran fine prior to all the changes so no reason to suspect anything other than an electrical problem. I am now wondering if it isn't a engine fault but an imobiliser problem and that the P0340 code is indeed a red herring. There is a mysterious black box in the car that doesn't appear on any of the parts lists. It's connected tot the imobiliser and doesn't look factory fitted, will post a picture of it.
As for the wiring diagrams, I have them in PDF if you want a look see.

Tracker?

[Mikie711]

Dom, that was what I was thinking but having never seen one I wouldn't know what it looked like.
The black one on the right?


Untitled by Mikie711, on Flickr

[Dominic]

Not sure!.... My first elise had it fitted, but I never found it on the car (although never looked too hard). A quick google image search does not turn up anything like that. Does not mean to say it's not tracker,.. or similar.

If the mystery box does not appear on any of the car's wiring diagrams, I wonder what would happen if you by-passed it / disconnected it? I would also like to point out that I am far from expert! Not sure if I'd take my own advice on the matter!

[Dominic]

The other thing I wondered about, was how fresh the petrol is? (Although if it's firing initially, it's probably not an issue).

[Mikie711]

Robin, with the sensor disconnected the results are exactly the same. Car catches but will not run.
Petrol is new super unleaded. Tank was drained for fuel pump and new fuel put in for starting it.

[Mikie711]

Little video of what is happening

Watch on YouTube

[robin]

The thing on the right appears to be some sort of transmitter/receiver -- the wee tab taped up looks like an aerial to me.

I doubt it is also an immobiliser, but possible. The thing to the left does actually look like the immobiliser relay but normally this interrupts crank/fuel pump both of which are running for you.

I don't know if the later ECUs have the MEMS-style immobiliser where the actual ECU pretends to be broken unless the immob has been cleared, so the engine will catch and immediately die. The Lotus K4 ECU did not have this feature, but maybe on the T4 they re-invented it?

If you send me the PDFs I can take a look and see if there is a path from the immobiliser receiver to the ECU, which would be a sure sign that such a feature exists.

Cheers,
Robin

[j2 lot]

Probably a totally numptie offering and sure you would have thought of it before now but it isn't by any chance a cut out /impact switch ? ( just because thats what the car does if the cut out has tripped)

[Mikie711]

Send it where Robin ?