[Mrmerlin]

from post 11
The customer tells me that he has been thru all the fuse contacts and relay plugs with a dremel prior to bringing the car in to me, and I trust him to have done a good job, however he also tells me that this thing is a bit of a mess in there as it has had various phone kits, alarms, and a towbar (!?!) thru the years.

I think there are issues with the CE panel drop it and look for wires with a sheen to them this indicates they got hot make sure none are melted into each other.
I also think the ignition wires are suspect the twin dizzy inspection also includes making sure thet rotors are both pointing at the hash marks at TDC, the little belt can look good but the timing can be off.

I would also go back to the CE panel and remove every relay and confirm its the correct poart number and its in the correct position.
There are more than few times when a PO has installed the wrong relay and or installed the relay in the wrong spot.

Go to the spare tire well and clean the grounds in the well,
and also look for a loom of brown wires going under the rear quarter panel liner,
and clean these.
A new set of ignition wires is needed