Belated update from last couple of weekends (when photobucket app was having a senile moment).
Firstly, picked up this:
Spare 2.0 petrol turbo engine for my Xantia, complete with box and all ancillaries except the hydraulic pump. Also includes full lpg kit (minus tank). I doubt I will use it, but it cost me £50 and means I can tune my other one without any worries of causing damage
Then last Sunday I went over to the barn for first time (proper) in ages, fixed my compressor and moved on to planned job no.2 - swapping the brake flexi's on this:

So that I could get back to moving it without the issues associated with having holes in your jugular

Unfortunately though, it wasn't playing. Wouldn't start (meaning couldn't get it off the deck to even get at the hoses

) so spent the next few hours trying to suss out what was wrong (without any of the service manuals to hand, so working just off grey cells from a good number of years ago and without a multimeter

).

It's a problem it's had intermittently for about a decade and I've never got firmly to the bottom of, normally because it clears within a few minutes of randomly fiddling with stuff (probably completely unconnected to the actual cause). Today it was in hard fault mode, so at least I stood a chance... I've always thought it was an ignition fault (having previously sorted what I found to be a fault on the fuel pump wiring) but... Nope. Spark fine, fuel pressure fine, so... That means it's the injectors not firing for some reason.
Memory told me the injectors should have a common live feed all the time and the ecu puts them to ground individually, whenever they need to fire. Without the wiring diagram though, there wasn't much I could do.
The injection loom has never been in great shape generally (rotted loom wrap and cracked connectors) so I'd re-wired one end years ago) but not got round to the other end, so I pulled that out to take it home and test/rebuild if needed.

Swapping the loom with the other cx behind this one isn't an option unfortunately - later car, with fewer sensors and no cold start injector (so not compatible).
Maybe in the course of all this, I'll finally get to the bottom of what the loose wire lurking in this area is

(never been able to work it out - not surprising considering all of the wiring looms basically consist of only 3 colours... Green, Brown or black)
