I have a frustrating issue with my truck. It starts up and runs great when cold. I can drive it all day with zero issues. If I kill it and start up right away its fine, if I kill it and let sit for 20min to an hour it starts for a couple sec then dies and wont start for 5 min or so. I think I smell fuel. I have already replaced the AFM and coolant temp senor. Looking for some advice before I throw more parts at it. thanks