I was out do a bit more mapping on the car trying to get the AFR's where I want them, and I feel the car start to miss slighty. Pulled over and the car seem to rev up fine, Pulled away again amd under load I could feel that it was still missing.
Thinking the worsed and hopeing for the best I drove the car home to try and fined the problem. I pulled the plugs, but th looked fine and I changed them with another set. Checked the wires and the cap and rotor and it all looked fine. Took it for a drive and the problem was cured.
I took a closer look at the plugs and on one the electrode was bent over to one side slightly, but the problem one was this. If you hold the metal part with the hex on it, you can twist the ceramic part! I guess something broke inside, or maybe it got too hot. But it could have made a big mess if it had fallen into the cylinder. It doesn't bare thinging about.
Is this a common fault or just ont of those things. But I do feel it was a lucky escape.!