2004 Ford F150 4x4 Ext Cab 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.

This Or That: Fiat 500 Abarth vs. Ford Fiesta ST [w/poll]

They're pretty darn similar. And yet our views are oh so different.
If you guys could read the transcripts of our editors' chat room, you'd know that we're a pretty argumentative bunch. It's always good-spirited stuff (well, usually), but when we're not obsessively covering this or that, we're usually fighting about one car being better than another. We're all enthusiasts here, and our automotive tastes run the gamut from the weird and unusual to the decidedly mainstream - we all feel strongly about specific cars in a given segment. While it usually makes for good conversation, if we're passionate enough, it can turn into a tomato-throwing showdown.

Ford Fiesta ST gets worked out on the track

We're big fans of the turbocharged Ford Focus ST, and we're plenty excited that the Blue Oval will be offering a similar treatment on the smaller Fiesta here in the United States, too. We first saw the production-ready Fiesta ST five-door at the Los Angeles Auto Show last fall, and Ford has now released this video of a Euro-spec three-door ST being flung around the track.
But not just any track - the challenging Track 7 of Ford's Lommel Proving Grounds in Belgium. The course features 20 turns and plenty of elevation changes along its 2.7-mile loop, and David Put, a vehicle dynamic specialist at Ford, shows just how good the pint-sized Fiesta ST is at handling the lot, even getting the smallest ST up on three wheels every now and then.
It sure does look like a lot of fun, and makes us really eager for our chance to try this ourselves. Scroll down to see the hot little Ford getting busy.