Why does my Porsche 997 have a misfire?
Why does my Porsche 997 have a misfire? Coil packs can very likely cause misfires. To check them you can swap them around to another cylinder and see if the misfire goes with the coil. Obviously, this only works if you are having a cylinder-specific misfire. Spark plugs can also cause misfires, especially if they are old or haven't been changed in a while. When does a misfire occur in an engine? A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of...