I have a 1998 Ka with the 1.3 Endura E.
It had a misfire issue which after a set of plugs and leads, went away. 3 of the 4 spark plugs snapped off in the head, meaning I had to get them out using a torx driver. This was ok but it resulted in debris falling into the cylinders.
I used a magnet and turned the engine over by hand to try and clear the cylinders out.
The car was then fine for a couple of weeks.
Now the misfire has returned twice in about 6 weeks. Each time cylinder 3's spark plug is fouled. It is black and has oily deposits on it. I changed the spark plug each time and misfire goes away for about 3 weeks.
The engine is noisy, and has smoke coming out the exhaust. It uses quite a bit of oil, too.
Does anyone know what I can do to solve this? Would resetting the valve clearances help the situation? Why is the plug fouling?
Thanks
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