Vccomm,
I Thought about the decompressors but I couldn't see that they could affect it and they were both taken from working machines so if all else fails I will change them again but I'm sure they are not the problem.
Blumbly; the "Extension lead" I made was just 2 in line spark testers linked up together. I checked and the spark was coming through nice and strong. I tried to unscrew the leads but they put up a good fight and I didn't want to force it. Come to think of it this may be my issue anyway. If the leads are rusted in this would be causing issues...I'll wait to find a working spare coil before I risk damaging this one further but you could be right regarding the path of least resistance.
I'm the same with cars - anything mechanical and I can work through it OK. Add electricity into the mix and it has my number VERY quickly!
Thanks,
Pete
