A couple of months ago, about once a week or every other week when i go out to start my truck it starts rights up then stalls out after 10-20 seconds. Then it takes a bit of effort to get it started following lots of smoke typically. Then it runs perfectly, a week will pass and it does it again. Lately though it seems like every other day its doing it, never when the engine is some what warm only after sitting over night. My truck has 175k miles and i don't know when the fuel filter was changed.