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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.

2015 Ford F-150 to get up to 26 miles per gallon

The 2015 Ford F-150 is one of the most important US vehicle debuts in years, be it in the pickup segment or the entire marketplace. While we've already known about the truck's engine lineup, its payload ratings and we've even learned a bit about how it drives, the truck's EPA-estimated fuel economy ratings have remained a mystery. The wait is finally over. Ford has announced numbers that put the latest F-150 as the mileage leader among gasoline-powered, full-size pickups in the US, with its new 2.7-liter EcoBoost V6 topping the charts. Starting with the entry-level naturally aspirated 3.5-liter V6, the rear-wheel-drive F-150 is rated at 18-miles-per-gallon city, 25-mpg highway and 20-mpg combined. Opting for four-wheel drive drops those numbers slightly to 17/23/19. If fuel economy is your absolute priority, then upgrading to the 2.7-liter EcoBoost V6 is the hot ticket. It improves things further to 19/26/22 in rear-wheel drive trim or 18/23/20 with four-wheel drive. The carryover naturally aspirated 5.0-liter V8 is rated at 15/22/18 as a 4X2 or 15/21/17 as a 4X4. Finally, the flagship 3.5-liter EcoBoost V6 tops the range in available torque and offers buyers 17/24/20 ratings with rear-wheel drive or 17/23/19 with four-wheel drive. "We are delivering with the toughest, smartest and most capable F-150 ever – and now the highest EPA-estimated fuel economy ratings of any full-size gas-powered pickup in America," said Raj Nair, Ford group vice president, Global Product Development, in the company's announcement. Depending on engine and drivetrain configuration, Ford contends that the 2.7-liter EcoBoost's top rating puts fuel economy up between 5 and 29 percent over the current generation, thanks in large part to the truck's lighter aluminum construction. Obviously, these are EPA estimates, and your mileage may vary – ours has. Recently, Autoblog team members have had real difficulty even approximating government mpg estimates on many EcoBoost models, including the new F-150. Scroll down to read Ford's full announcement, including comparisons to rival models.

IIHS updates overlap test: 2 SUVs get good marks, 9 fare poorly

Vehicles in crashes keep occupants safe by deforming around the cabin in a way that maintains cabin integrity. The Insurance Institute for Highway Safety's moderate overlap test, introduced in 1995, has been a huge contributor to improved safety for front-row passengers in a crash. IIHS President David Harkey said, "Thanks to automakers’ improvements, drivers in most vehicles are nearly 50% less likely to be killed in a frontal crash today than they were 25 years ago." In the 'unintentional side effects' column, crash safety has gotten worse for passengers in the back seats. When carmakers reengineered the front crash structure to protect the driver, more crash forces got distributed throughout the rear. IIHS research claims rear passengers have a 46% greater risk of fatal injury than front-row passengers, but back-seaters haven't benefited from the same upgrades in safety as the front row. The IIHS updated its moderate overlap test to address the issue, putting 15 vehicles through the new regime. Two earned good ratings — the 2023 Ford Escape and the 2021-2023 Volvo XC40 — one was acceptable, three were marginal and nine were rated poor. Every one of the crossovers sampled got good marks for all passengers in the original test. That test sees 40% of vehicle's width on the driver's side impacting an aluminum honeycomb barrier at 40 miles per hour. The updated test puts a crash dummy representing small woman or 12-year-old child in the seat behind the driver, the dummy's sensors and grease paint measuring the effectiveness of the restraints and the forces a human body would need to endure. To achieve a good rating, the "measurements must not exceed limits indicating excessive risk of injury to the head, neck, chest, abdomen or thigh." An institute engineer said, "In real-world crashes, chest injuries are the most common serious rear-seat injuries for adults." The sensors and video evidence showed back seat dummies in the Escape and XC40 endured minimal risk of injuries from excessive crash forces, from submarining under the seat belt, or from unwanted interaction with the side curtain airbag.   The Toyota RAV4 scored acceptable. The second-row dummy also endured minimal risk of injury to the chest and lower extremities. However, the lap belt slipped upward in a way that could increase abdominal injuries, and after the dummy's head dipped during crash impact, the head came back up between the rear curtain airbag and rear window.