Ta.
I initially replaced the decade-old fried BERUs (which were still firing fine, in spite of their poor condition, corrosion and splits) with some cosmetically 'good as new ones' from the scrappy. At that point she was running sweet as a nut, after a poor idle was traced to a wrongly-adjusted throttle body.
On fitting the car ran like a bag of spanners. So off they came and some brand new Bosch ones were ordered and went on. Sadly I wasn't able to get the car fully assembled and run again until just after Xmas, whereupon she was running terrible again - smoothing out a little after a 15 minute idle and nearly up to temp.
Will get a cheap n cheerful spark tester off the heebay right away. Won't get chance to work on her until mid week/this weekend, so not desperate.
Hoping it's one of...
-Current DIS (as I have a spare - I just need to know it's reliable!)
-Dodgy wiring/water ingress (as the current DIS is plumbed in via chocolate box connectors - ugh!)
-Plugs (bit of a coincidence, though)
-Fueling (I have a small fuel leak, though why she should run sweet as a nut until the fitting of the Scrappy leads, I don't know - coincidence?)
And not...
-HT leads (because they're brand new!)
-Loom / ECU, (as I don't have any spares lying about
)