It is still a COP problem. You have either water or anti freeze inside of the spark plug hole, and it has to be replaired. This water intrusion prevents the spark from reaching the plug and the plug will not fire. This lack of fire prevents the injector from changing state, and you will troubleshoot it till the cows come home without a positive result.
Remove the plug, using the proper procedure and you should be fine after that.
Often washing an engine or driving after some serious rain can result in this type os symptom.
Id be willing to wager a cold adult beverage on this one.