I noticed this weekend when leaving from a stoplight that my engine seemed to die out and then it started running again, sort of a hiccup. This happend twice within about 30 minutes and then it ran fine after that. It was a warm day and engine was at running temperature. The fuel filter is new with about 1500 miles on it. I did not notice any smoke at all. Any idea what can cause this intermittent problem? 2002 lb7 Juiced.