2014 Ford F150 on 2040-cars

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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.

2014 Ford Fiesta 1.0L EcoBoost

I'll be honest; when Ford first unveiled its 3.5-liter EcoBoost V6, I was skeptical. Past attempts at building turbocharged American cars were almost universally awful, I reasoned, so why would Ford's latest effort be any different? This may seem foolish today, considering the success that the growing EcoBoost range has achieved - particularly the 2.0-liter and 1.6-liter mills. Yet I once again found myself questioning Ford.
It's the makeup of the 1.0-liter, turbocharged three-cylinder slotted into the compact engine bay of this Fiesta that has a way of breeding doubt. Three-cylinder engines remain an extreme rarity in the US. What's more, they earned a less-than-desirable reputation for applications in the 1980s and 1990s, and my trepidation about this latest three-pot as a result.
As I found out, though, history is a poor informant of modern technology. The thrust available in other cars with the EcoBoost badge on the back has not gone missing here; something the International Engine of the Year committee has lauded. That august body named the 1.0-liter Ecoboost the best engine of 2012 and 2013. After a week of driving, it didn't take long for my fear of threes to get turned into something like that line of thinking.

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