Following a lawsuit by some Ohio owners of Ford F-150 and Taurus SHO models equipped with the 3.5-liter EcoBoost V-6 engine, the National Highway Traffic Safety Administration has opened a preliminary investigation after receiving a total of 95 complaints of similar issues by other owners. The investigation pertains specifically to 2011-2013 F-150 models with the EcoBoost engine.

The complaint alleges decreased acceleration during freeway passing maneuvers, often during humid or damp conditions. Ford has issued three technical service bulletins attempting to rectify the issue, the latest which consists of reprogramming of the powertrain control module, and replacement of the charge air cooler (intercooler) and air deflector plate.

The initial lawsuit alleges failure to publicly disclose the TSB notifications to owners by Ford. As many as 400,000 vehicles could be potentially be involved in the investigation, and a possible recall, if such action is warranted. Some owners have complained of potential safety issues in regard to not being able to safely overtake a vehicle, but not accidents or injuries have been reported to date in association with this issue. Since its introduction, the EcoBoost has been one of the most popular engine options in the F-150, currently accounting for approximately 43 percent of the model's sales.

Source: NHTSA