Miss at idle
 

Alright i cant win. After getting everthing lined out for about 2 weeks now my truck is missing at an idle. However the miss is random and does not happen all the time. Sometimes it can be worse than others. It "seems" that it likes to happen more often after being run hard or after a long drive. I am to the point where this high mileage turd is gonna leave my posession! lol I cant win for loosing. I thinking it is possibly a lift pump or overflow valve taking a crap. What do you guys think?