[Karl]

Finally I think I'm getting somewhere. As mentioned by a few posters here already I think the problem is on the radio interference resistors on the end of the spark plug leads. I have noted that when i have been pulling the plug wires off to check for spark when running I have been getting a shock through the resistor bodies on some of them. Today I replaced them with a new set of NGK 5000 Ohm resistors. Just for interest I checked the resistance on the old resistors they were all over the place they ranged from 9000 ohms to 48000 ohms -not sure if this is the cause off the problem but seems to be running better .