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I would give those parts a try before worrying about anything else. The likelihood is that it's the coil pack or leads, IMHO. If that doesn't clear it we can have another think.
Kevin
Did you manage to check any engine fault codes using code reader (not the paperclip test)?
It’s also good to check all information about the engine – MAF sensor values, O2 sensors, engine temp etc.
What about spark plugs – do they look the same or are there any different colour? – you can check old ones.
Yes, you can check the DIS pack when it’s out of the car. It cannot be connected. You can check the resistance so this should show any irregularities like rev related (poor voltage conversion, short circuit). It might not show any problems heat related as when cold resistance can be OK.
You can use the cheapest reader http://irma.pl/photos/article/miernik_elektryczny.jpg like this one
Did you managed to check any engine fault codes using code reader (not the paperclip test)?
It’s also good to check all information about the engine – MAF sensor values, O2 sensors, engine temp etc.
What about spark plugs – do they looks the same or are there any different color? – you can check old ones.
Testing procedure as follows (DIS needs to be disconnected!):
Low voltage input. Check between pins:
1-4
2-4
3-4
Resistance should be between 0.45 do 0.65 Ohm.
High voltage output. Check between pins::
1-4
2-5
3-6
Resistance between 11000-16000 Ohm
I’m afraid that you have to remove the plenum
