When it get's hot outside, mostly when over 90, when getting off the highway, and say approaching a light or stop sign. She will stall/die when starting off again. Have to keep her moving so she won't stall/die, at lights have to put in neutral and ref the engine up. Also, I've had the engine just shut off driving on the highway. In these cases, if I wait about a half hour or so, she will start up again and run good for about 100 miles or so and the engine would just shut off again. I've had the intake manifold gasket replaced, EGR valve, fuel filter, and PCM valve replaced. This has been going on since probably Sep 2012. I'm thinking maybe fuel pump should be replaced. In colder temps outside, especially in the winter, but cannot say for sure, I don't take it on longer trips anymore, she runs great. Otherwise great truck, so far.