So today as I was driving home, the truck started to misfire it seemed and than shut off. No check engine light or anything and i try and turn it over and nothing happens, I have power still but the starter wont turn. so I get it pulled home. And I jump in the truck and turn it over and it fires right up. The same thing happend on the free way except it started right back up right away. And it seems like my mpg have dropped alot. Any thoughts? the motor does have 326,000 miles on it. idk. any suggestions?