[CharlesJones]

Update:

Well I took the DME out of the car and opened it up, and unfortunately those solder joints (for component T504) look absolutely fine as far as I can tell - nice shiny smooth joints with no cracks in them. Drat! Maybe there is something else wrong with the DME, but I will try some more diagnostics before I send it anywhere to have it looked at.

I still haven't got myself a noid light yet, and still haven't checked for spark coming out of the coil. The only thing I have tested for is power to the coil (which is there) and spark at the spark plugs (not present) by pulling a HT lead and grounding a spare spark plug against the inlet mainfold.

What I need to do next is check for spark from the actual ignition coil (as opposed to from the distributor), and for an injector pulse which I will test when I get a noid light kit. I am guessing I will have neither since I can't smell any unburnt fuel at all, which suggests there is no injector pulse, and if I have no injector pulse then the coil mustn't be given spark either sicne there is no spark at the plugs. I will check this conclusively though and report back.

Thanks.