 Only firing on three
A week ago as I was driving home from work my m44 318ti started to only fire on three cylinders. I lifted the hood and checked it out. I found that no 1 cylinder was not firing due to the plug hole having water in it. I dried it out and put the lead back on the plug and all was well until yesterday when the same happened again. As it rained yesterday is this the cause or is it possible that coolent is coming into the hole from the head. It seems impossible for it to be coolent and im not losing any, the car runs sweet as a nut when all 4 are firing.Has any one else had this experience? | 
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