Hi there guys, i recently changed my spark plugs and everything seemed okay. There was this little black piece of plastic that is stuck on one of the old ones though, i didnt think much of it but now im starting to wonder if it came off the coil pack when i took it off! Could someone shed some light on it please? Also my car has been shaking alot on cold starts and saying "anti pollution faulty" could be something to do with the coil pack apparently. Its a 1.6 Petrol Citroen C4.
