Ian C,
I am inclined to go with 2a or 2b. I would think 2b because the plugs were replaced before the other work was carried out and the symptom are in line with what I'm experiencing.
Any idea what gap the plugs should be set to for 1.2 BAR?
I have discounted 2a because adjusting the AFR to vary air/fuel mixture has no effect on the problem although I really need to get someone to set this up correctly for me.
I also think that I need to remove the stock soleniod and reset the ECU which I hope to do later today.
Thanks for taking the time to put such an exhaustive list together and would say this is definately one for the club FAQ area.
Once again thanks to all and if any of you that have helped on this thread are at this Sunday's Lake District meet I'll buy you a soft drink (because we'll all be driving).
I had been quoted a lot of dosh to diagnose this fault so if anyone was swithering on whether to renew their club membership this thread (and many more no doubt) should make the answer a no-brainer!