Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Thought I had cured this but now back on 3 cyls, it is definitely a spark problem, one coil supplies number 3/4 cylinders and has intermittent spark on only one lead! It looks like the leads are good but maybe broken internally? how can I check a coil, I have a cheap multimeter but don't know how. Ash will know!