So in the typical style of my ol truck it has developed some more interesting issues. Occasionally on startup it will fire, spit and sputter then die. After 30 seconds or so of cranking it fires back up and idles like normal. It also has a pretty decent miss at higher rpms still. And the most frustrating part is when you hammer it up to governed speed it dies, just flat dies. If I keep in the throttle it usually sputters back to life. Just replaced lift pump and fuel filter. Ideas?