I am having problems with my truck starting at different times. Changed the fuel pump twice thinking the first one might be defective but I am still having problems. When I go to start my truck the lights turn on and everything seems to show that alternator and battery are ok, if I wait 10 - 15 minutes, the truck will start and run normally. Is anyone else having this problem or can any one suggest a solution? I am at the end of my rope!!!!! It never seems to start when I need it the most!