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NHTSA closes probes on Jeep Grand Cherokee, Ford Freestar and Mercury Monterey

The Detroit News reports the National Highway Traffic Safety Administration has officially closed its investigations into 2012 Jeep Grand Cherokee, 2004-2005 Ford Freestar and Mercury Monterey models. The separate probes found no issues that pose safety concerns. NHTSA began investigating certain Grand Cherokee SUVs over complaints that power steering hoses could detach during operation, thereby increasing the risk of a vehicle fire. Of the 24 reports of failure, none alleged smoke or fire in the engine bay, and Chrysler has since modified the power steering cooler assembly to reduce the likelihood of the failure.
Meanwhile, certain Ford Freestar and Mercury Monterey vehicles garnered a government probe after receiving complaints that the models were equipped with faulty scissor jacks. The agency had received six reports of the jacks failing or causing injuries, including one incident that resulted in a fatality. But NHTSA says the jack failure rate is similar to those found in other vehicles. In those six cases, the government agency found the jacks were being used for something other than changing a tire, and investigators could not determine whether the emergency brake was set or the rear tires were properly chocked.

Ford recalling 450,000 Fusion, Mercury Milan sedans

Ford has announced a pair of recalls, and both are critical safety issues. The exponentially larger of the two recall campaigns affects over 450,000 Ford Fusion and Mercury Milan sedans manufactured at the Hermosillo plant between July 21, 2008, and March 4, 2011. The canister purge valve in the fuel tank could malfunction and could cause the top of the tank to crack and leak fuel. That could cause a fire, although Ford "is not aware of any accidents, injuries or fires" resulting from the issue. Affected vehicles will have their ECU software updated and their fuel tanks inspected for potential replacement. The company estimates there are 411,205 affected units in the United States (and its federalized territories), plus another 33,605 in Canada, and 7,055 in Mexico. The second recall affects 13 F-650 trucks. The column shifter's park position mechanism may fracture and let the truck roll away unexpectedly. Those 2016 models built in Ohio between July 29 and September 3, 2015 are all located in the US. Fixing the problem will require replacing the steering column and reconfiguring the instrument panel. FORD ISSUES TWO SAFETY RECALLS IN NORTH AMERICA DEARBORN, Mich., Nov. 23, 2015 – Ford Motor Company is issuing two safety recalls in North America. Ford is not aware of any accidents, injuries or fires related to these conditions. Details are as follows: Ford issues safety recall for certain 2010-2011 Ford Fusion and Mercury Milan vehicles in North America for potential fuel tank issue Ford Motor Company is issuing a safety recall for approximately 450,000 2010-2011 Ford Fusion and Mercury Milan vehicles for a potential issue with the fuel tank. Some of these vehicles might have a canister purge valve that does not work properly, causing internal pressure changes inside the fuel tank. Repeated pressure changes inside the tank could result in a crack on the top of the tank, possibly allowing fuel to leak. A fuel leak in the presence of an ignition source can lead to a fire. Ford is not aware of any accidents, injuries or fires related to this condition. Affected vehicles include certain 2010-2011 Ford Fusion and Mercury Milan vehicles built at Hermosillo Assembly Plant from July 21, 2008 through March 4, 2011. There are a total of approximately 451,865 vehicles that might be affected in North America, including 411,205 vehicles in the United States and federalized territories, 33,605 in Canada and 7,055 in Mexico.

Ford finds flex-fuel engine design plays big role in emissions output

How bad is ethanol for your engine? There's been a lot of debate on this issue as the US considers upping the biofuel content in the national gasoline supply from 10 percent (E10) to 15 percent (E15). The ethanol industry and some scientists say higher ethanol blends show no "meaningful differences" in new engines while the oil industry says ethanol creates health risks. Researchers working at the Ford Research and Innovation Center decided to take a closer look at how a wide range of gas-ethanol blends - E0, E10, E20, E30, E40, E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. To see the full report, printed in the journal Environmental Science & Technology, requires payment, but there is an abstract and Green Car Congress has some more details. The gist is that, "with increasing ethanol content in the fuel, the tailpipe emissions of ethanol, acetaldehyde, formaldehyde, methane, and ammonia increased." At least NOx and NMHC emissions decreased. The researchers say that the effects are due to the fuel and "are expected for all FFVs," but that the way that a manufacturer calibrates the engine will affect NOx, THC, and NMOG emissions. It's this last bit that's important, since the researchers found, "Higher ethanol content in gasoline affects several fundamental fuel properties that can impact emissions. ... These changes can have positive or negative effects that can depend on engine design, hardware, and control strategy. In addition to direct emissions impacts, higher ethanol content fuel can also provide more efficient combustion and overall engine operation under part-load conditions and under knock-limited higher-load conditions." So, as we head towards more ethanol in our fuel supply (maybe), manufacturers are going to need to learn how to burn it most efficiently.