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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.

The tricky business of octane, power, and MPG

Given tepid green-car sales numbers this year, consumers in the US aren't making the transition away from internal combustion engines too quickly. Regulations are still mandating cleaner emissions, though. In addition to downsizing and turbocharging, there's growing consideration about moving to higher-octane fuel to improve overall efficiency. In a new report, engineers at FCA, Ford and General Motors Powertrain are showing that it could work, too. The major advantage to higher-octane fuel is that it supports higher compression ratios. That in turn can lead to more power from burning the same amount of gas. "Higher ethanol content is one available option for increasing the octane ratings of gasoline and would provide additional engine efficiency benefits for part and full load operation," the researchers write in the study's abstract. The authors even think it could be possible to update some modern vehicles' engine calibration to be optimized for the better gas. While the benefits are there, we still have a long way to go before higher-octane fuel becomes a national standard. According to Green Car Congress, 87 percent of the gas sold in the US is regular grade 87-octane. Meanwhile, premium 91-93 octane makes up just 10 percent. The various grades of fuel illuminate even more annoyances with the current system. For example, Ford generally recommends 93-octane for EcoBoost engines, and the power outputs that the company publishes are based on using it. However according to Green Car Reports, such premium gas is very difficult to find in some regions of the US, especially along the West Coast. The powertrains still run on lesser grades but with lower power output. The researchers' discussion of possibly increasing ethanol in gas also comes during a heated debate on the substance. The current administration is pushing for less of the corn-based fuel in the coming years. Although, several presidential hopefuls might be favor of reversing that course.

Ford investing $500M in engine plant for 2.7L EcoBoost production

Ohio is a hot area for Ford at the moment with the announcement just a few weeks ago that production of the next-generation F-650/F-750 medium-duty trucks would move from Mexico to the Ohio Assembly Plant in Avon Lake, Ohio. Now, Ford is investing $500 million to hire 300 workers at its Lima Engine Plant in Lima, Ohio, to add production of the twin-turbo 2.7-liter EcoBoost V6 for the 2015 F-150.
The latest investment will be used to add a new flexible engine assembly system and renovate 700,000 square feet of the plant for machining and assembly areas. The Lima factory already builds Ford's 3.5-liter and 3.7-liter Duratec V6 engines. The plant opened in 1957, and it's on track to build its 40 millionth engine later this year.
Ford claims that the 2.7-liter EcoBoost will offer V8 performance with better efficiency in the F-150. It comes standard with intelligent stop/start that doesn't activate when the truck is towing or in four-wheel drive, and it's made from a combination of compacted graphite iron and aluminum for low weight and high strength. The company says that V6 engines have already proven popular in the F-150 with 57 percent of trucks in 2014 being equipped with either the naturally aspirated 3.7-liter or turbocharged 3.5-liter EcoBoost engines.