[shorod]

Welcome to the Forum!

As a general rule of thumb, it is helpful if you post with the year and engine of your car (V-6 or V-8 is usually sufficient for engine).

There is a chance that water found its way down the spark plug wells. Or, you may have the common valve cover gasket leak and oil is filling the spark plug wells. You may also have a coil that went bad at the same time (coincidence).

If you get the codes read, it should point you in the direction of the misfiring cylinder. Many auto parts stores will perform the code scan at no charge (you just are required to humor them by listening to their diagnosis and sales speech). Get the actual code number though rather than just the description, and don't buy a coil from them just because the code says cylinder x is misfiring.

Good luck, and please report back with your findings.

-Rod