buck miss one time in about 10 miles sometime check light not on on 2006 Ford Freestar

miss or buck one time in about 10 miles check light not on put plug and wire and gas filler and still dose it will do it more went snowing out some days it run good

Asked by for the 2006 Ford Freestar
Wow, one time in 10 miles, that's a tough one to recreate to see what's going on with a diagnostic tool even.

My thoughts are that even with the new plugs and wires, you could have an intermittent misfire on a cylinder, made worse by moisture as when it snows. Catching it in the act is really the trick, though, before throwing any further funds at it.