One problem related to engine cooling system has been reported for the 2008 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Ford F-150 based on all problems reported for the 2008 F-150.
Ford F-150 has accelerated with foot on brake pedal 4 times, twice while in reverse, twice when stopping, always at low speed. It was hard to stop truck, even with foot full on pedal. The engine was racing with high rpm's. Restarting engine resolved issue or putting it in neutral. There is also an issue with a/c ventilation. Temperature varies from cool to hot when dial is set to mostly cool air flow, requiring constant adjusting. Truck has been to dealer 3 times and am told they can't fix it unless they experience it themselves.