I have noted this problem can happens several times in a day and after driving for a while, maybe 20, 30 miles. The truck hesitates in starting. I have to try twice to get it running. I have checked the Haynes manual and saw it can be the fuel pump, the air filter or a clogged fuel line. I am planning in buying a new gas pump and install it myself. This truck is experiencing a lot of failures I will try to report.