Aww man, it's all just gone to shiver now.
First off, it's developed a slightly different type of incontinence to what it normally has. It's losing coolant but I can't quite tell where from. Did a compression test as well as pressure tested the cooling system (dad's got an old proper radiator pressure testing pump from his mobile mechanic days) and all came up OK. I'm thinking it might just be the radiator cap so I'll replace that shortly.
Most recently it's started running like death between two bumper bars
it wont idle on it's own and hesitates very very badly when trying to accelerate. It pops back through the carbs when trying to accelerate and pops out the exhaust when lifting off the throttle. Just yesterday I replaced the plug leads with no improvement. The old ones had been rubbing on the bonnet so they needed to be replaced anyway. It did seem to make an improvement on the way home but was back to normal (read; crook as a dog) on the way to work this morning.
The internals of the electronic dizzy are all new as is the coil and cap. My alternator has been charging a little funny (sometimes high, sometimes low) but it's been doing that forever. Also, whilst stuffing about with it today I noticed that the wire to the capacitor/condenser (can't remember the correct name) on the alternator had broken off. I twitched the wires together and taped it up to get it home but while dropping into the parts place on my way home I discovered they'd closed down
Also, the ignition switch has crapped itself. One of the brass tangs where the wiring loom plugs into it had broken off. This explains why the car all of a sudden switches itself off. In peak hour traffic. On the M4. In the right lane doing 110km/h
This has also been bodgily soldered together while I source a new one and it seems to be holding.
I'm fairly confident that it's not an ignition issue so I'm now looking at the fuel system. The filter is ok (I blew through it with no restriction) so I'm going to check the pump. I'm running a fairly new Carter 4070 with a Malpassi pressure regulator that is also less than nine months old.
I'm hoping that it's not an obstruction in the carbs as I don't really want to pull them apart. Plus they were cleaned up and re-jetted (badly) less than nine months ago too.
Where else should I be looking?