Hi, for a few days now my C70 Coupe has been running like a sack of nuts. Ruckled while starting and speeding up. I then had the idea to buy him a set of new spark plugs, in the hope that the error will disappear and I can save myself the workshop visit. So I got the original candles from Volvo. With the first cylinder everything was good, old candle also looked used up. New pure, correct torque, further. With the second cylinder the spark plug channel was then badly ruined (see picture) which surprised me very much. So not enough, the spark plug was loose, I could easily move it with the finger in the thread. I then unscrewed it and had to find out that half of the mass electrode was missing. The car ran 109000 and got its last inspection with the friend when I bought the car (a year ago and 20000km). No idea who didn’t properly tighten the candle then left the change for the remaining cylinders and then would have to drag it to the workshop next week. I actually reckoned that the car could do something wrong.