As you can see, there are many things that can be the cause of an idling problem. This section will attempt to narrow it down, but expect some trial-and-error. Skip to the section that applies to you: Engine Idle Is Too Low Or Stalls or Engine Idle Is Too High. They are in a general most-likely-to-occur order.
1 Get inside a home, building, or hard top automobile (not a convertible). Although you may be injured if lightning strikes your car, you are much safer inside a vehicle than outside.  Remember, rubber-soled shoes and rubber tires provide NO protection from lightning.
Metal piping or water doesn't attract lightning more than rubber tires isolate it; those are urban legends. Unless you take a bath outside, on the top of a hill, you are safe. Incidentally, what will protect you from lightning in a car, is not the rubber tires but the Faraday cage's effect of the metallic body. Electricity travels outside such a metal cage, never inside.