May 28, 2013 12:11 PM EDT
NHTSA Investigating 400,000 Ford F-150 Pickups for Reduced Engine Power (VIDEO)

The National Highway Traffic Safety Administration has opened an investigation into approximately 400,000 Ford F-150 pickup trucks after a number of complaints were submitted of possible acceleration issues.

The NHTSA has received 95 complaints regarding "incidents of reduced engine power during hard accelerations" on 2011-2013 trucks equipped with 3.5-liter gasoline turbocharged direct injection EcoBoost engines.

Many of the complaints allege safety concerns associated with passing vehicles, but no crashes or injuries have been reported as of press time.

"Complainants allege unexpected sharp reductions in engine power during hard accelerations at highway speeds, such as attempted merging or passing maneuvers," said NHTSA according to Edmunds.

A preliminary investigation is the first step the NHTSA takes which could ultimately lead to a recall if safety regulators decide an issue needs to be fixed by Ford.

Ford has cooperated with the NHTSA so far according to Reuters.

The F-150 is currently the top-selling vehicle in the U.S. market and a recall could hurt sales numbers drastically.

Ford has issued three technical service bulletins relating to intermittent misfire on acceleration from highway cruise in humid or damp conditions in some 2011 and 2012 F-150 vehicles equipped with 3.5-liter GTDI engines according to Reuters.

"Approximately one-third of the reports received indicate that the incidents occurred while driving in humid or rainy conditions," said NHTSA. "Many complaints allege safety concerns associated with overtaking vehicles."

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