Evora 400 Wiring Diagrams. Help please! 5 months of trouble.

[Burnt]

Hello all,

Let me provide some background. New to Lotus, bought my 400 in December 22. About a similar tine to Nifty, whose thread I commented on about my own problems. Very happy to see Nifty seems to have a good result!

I'm still in limbo.... And I'd like some help. This is a long (ish) read. TLDR at the end.

 

The car went out for a very short drive early Feb, having been hardly driven ( keep away from salt) on a dry Saturday afternoon. Warmed up but not thrashed, my son is with me and we are off to tesco, a few miles away. Change from 3rd to 2nd passing through a roundabout, there is a rumble ( best description - sorry) and I see we are now like a red arrow jet pluming smoke out the back. We approach red traffic lights and the car stalls. Manage a re start and crawl down the hill to a retail park to shut it down, engine is running very roughly. AA called, OBD shows faults with cylinders one and two with a few more un classified faults. AA can't fix but we get the car home on a flat bed, thanks to AA.

Now, I live a good hour from the nearest approved Lotus dealer so I call my regular garage that's looked after our Audi and Ford. They have experience with TVR and older Porsches ( there's a rather nice 944 Lux and Cerbera there just now). The owner is not a Lotus specialist but happy to take it in. 

We think Head G perhaps but after tests ( dye injection), the Head is fine, The smoke is Blue and stinks of fuel. Garage has the car for 3 weeks ( busy) but the owner himself works on it. He's flushed it with injector cleaner suspecting it might be the problem. He finds no faults. Weird but ok, Car runs ok. I get the call to come collect and DRIVE it. He's filled the tank with injector cleaner hoping this will fix. Gives me two cans to use over the next few refills. 

I get towards home, past that and go to pick up Jn from school, he will be elated. Get home, car stalls on my drive. Ehhh, ok.... Re start and boom. LOTS of smoke. ( at this point I really am wishing I'd bought that Cayman 😆)

I call "Joe" ( garage owner, not his real name). We face time and he can see the car billowing smoke. He's fairly convinced it's the injectors. We know petrol is hygroscopic. The car is a 2016 with 22k on the clock. He suspects water may have corroded the injectors. We want to replace all of them as a precaution, not just cylinders one and two.....

 

Here's the problem. Joe tells me he really needs the wiring diagrams for the control unit ( i guess the ECU) to the injectors as he wants to run a few checks on that first. 

He's not had much luck on that front. He's called Hethel, no help. Today I call Hethel. Hmmm not much help either. I have to email them. The chap on the phone was persistent in trying to get someone on the line but ultimately no joy.

 

TLDR...

Evora 400 suspect injector failure, garage needs wiring diagrams of the system to help diagnose and hopefully fix.

 

So, can anyone provide wiring diagrams for an Evora 400 fuel injector system? Or point me where to a source ( have googled) Any other thoughts? 

I really do not want to give up on this car but there is a limit....

 

Many thanks in advance, 

 

Post script : Car bought from large dealer 300 plus miles away. Third party warranty but there are the usual caveats/ get out of jail cards. IE, we don't cover corrosion..... Joy. Oh and if you read this ( thank you ) and there are few replies, I'd be eternally grateful if you could bump this post on to friends who might know but not have read )  

 

 

[exeterjeep]

try ? https://en.lotus-club.eu/manual_download.php?id=137 

(sure Lotus have copyright!!)

searched for A132T0327D.              2015 Evora 400 workshop manual.pdf

[ramjet]

Not sure about this, but would Lotus have made massive changes to what Toyota would supply the engines with or is the ECU all proprietary?

[EGTE]

It's a Lotus ECU.

[Bibs]

For a small fee it looks like you can download them from Lotus...

https://vsic.lotuscars.com/node/283

You'll only need 1 hour access which I think is pretty cheap and you can download as much as you can find in that time! 

[exeterjeep]

4 minutes ago, Bibs said:

For a small fee it looks like you can download them from Lotus...

Not sure about this, but if you have a suitable diagnostic tool you may be able to access the software when connected to the car, to use the Lotus tech centre?

[Bibs]

No, the ECU is encrypted and the OP wants just the wiring diagram so Garage Joe can perform some diagnostics on the loom from the ECU to the injectors as I understand it. 

[exeterjeep]

Was thinking if the OP's garage wanted to get better access to the car, some interesting info here,

https://www.lotustalk.com/threads/lotus-20-20-diagnostic-software.487149/

[DH2]

If you want to actuate the injectors, do it at the injector?   Or take them out, get them cleaned and tested, then you rule in or out a faulty injector properly.

Evora ECU access is a bit painful to just actuate the injectors down the loom.  If you find one not working, you're going to try the injector first, before it being a loom issue.

I assume you've looked in the bores to see if it is full of fuel after it has blown smoke?

Dave

[Burnt]

Well, first off, many many thanks for all the replies.

I took that option up Bibs and paid my money for the hour, You were quite correct, 20 mins and I pulled everything I could. That's now with 'Joe' for his perusal in the hope it will be of use to him. You are also correct in your summation, diagnostics first before bits get pulled apart. At least that's my understanding on how Joe will move on. I'm obviously no expert so I won't disagree, I do however have a gut feeling it will be a new bank of injectors across the board. Gulp...

DH2/Dave, no the bores have not been looked at (yet). What we did notice is that after a week or so, the car will start fine, no smoke, manage a mile or two before smoking. Leave it for a while and the problem appears to clear. That could be indicative of fuel pooling in the pots then evaporating away?

I'm not driving the car at all just now, a risk of hydrolocking the engine? I've heard of that with water for sure but not fuel. Car locked away in my garage. It will be flat bedded back to the garage in due course.

Regarding diagnostic tools, I think that's a bridge that may need to be crossed at some point? Not sure. Worst case is I have to stump up and have the car transported the hour plus drive the nearest approved dealer. That could be hundreds alone though as I don't know anyone with a trailer. If needs be however....

Thanks again everyone. Will keep updated if anyone's interested.

[Bibs]

Will your AA Policy cover the trip to the nearest approved service centre?

[Burnt]

Unfortunately not.