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Ford Mustang EcoBoost has fake engine soundtrack

The 2015 Ford Mustang EcoBoost represents a huge change for the Blue Oval as the first pony car in decades to be available with a four-cylinder engine. But a recent tweet (below) from Road & Track raised our curiosity about the new vehicle. Editor Jason Cammisa pulled a fuse while driving the latest 'Stang with the 2.3-liter EcoBoost engine, and he found that both the stereo and engine went quiet in the cabin. That indicated the coupe might have some form of artificial engine sound being piped in - a feature not previously heavily reported for the model. Autoblog spoke with Ford engineer Shawn Carney who confirmed that only the turbocharged four-cylinder Mustang comes with this system, called Active Noise Control.
@jasoncammisa pulls fuse 27 on 4cyl #2015mustang EcoBoost. Both stereo & engine go quiet. #FakeEngineNoise #busted! pic.twitter.com/WNzQefCbtQ

- Road & Track (@RoadandTrack) September 17, 2014

NHTSA closes investigations into Ford Taurus, Hyundai Santa Fe

Ford and Hyundai are out from under the scrutinizing eyes of the National Highway Traffic Safety Administration after the government agency said it was closing investigations against both automakers over vehicle safety concerns.
Ford was being investigated for reported damaged speed control cables on Ford Taurus (shown above) and Mercury Sable models, both built between 2000 and 2003. Vehicles with the company's Duratec engines allegedly failed to allow owners to brake as expected. Owners lodged 100 complaints and were involved in five accidents, according to NHTSA records. The American automaker responded to the reports, and on June 21 of this year, said that it would inspect and repair all affected vehicles, regardless of the mileage.
Hyundai was under investigation for a reported loose fastener on the steering shaft of its 2011 Santa Fe (shown in the gallery below). After NHTSA launched its inquiry, the Korean automaker responded with its own investigation that yielded four affected vehicles. Following the inspection of 680 vehicles at its assembly plant, Hyundai said the issue was due to employee error and that no further defects have been found.

NHTSA closes Ford F-150 EcoBoost acceleration probe

Typically when we report on the findings of an investigation from the National Highway Traffic Safety Administration, it's because the government body has discovered a safety issue and prescribed a recall. In this case, however, NHTSA has closed an investigation into a reported performance deficit without ever getting to the recall stage.
The issue revolves around the Ford F-150 - specifically those equipped with the 3.5-liter EcoBoost engine - of which some 360,000 were built in the 2011, 2012 and 2013 model years. After receiving an initial 95 complaints, NHTSA opened an investigation last May - almost a year ago - into the reported issue of reduced engine power under hard acceleration. The agency has since received a total of 525 such complaints, and Ford itself reported receiving over 4,000.
Together, NHTSA and Ford determined that the problem resulted from cylinders misfiring, an issue itself stemming from water getting into the charge air cooler (CAC) mated to the turbochargers. In particularly humid or rainy conditions, water was found to get into the CAC, causing some of the cylinders to misfire, which in turn triggered the ECU to disable those cylinders in order to protect the catalytic converter from damage.