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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.

NHTSA investigating 725k Ford, Mercury vehicles for stalling issue

Owners of Ford Escape, Mercury Mariner, Ford Fusion and Mercury Milan models, listen up. According to a report on Automotive News, the National Highway Traffic Safety Administration has opened an investigation into these four vehicles totaling an estimated 725,000 units. The investigation appears to center around a malfunctioning throttle body on non-hybrid models of the 2005-2012 Escape and 2011-2012 Fusion. With Mercury dying off after the 2011 model year, this probe will also apply to the 2005 through 2011 Mariner and the 2011 Milan. There has been some discussion around the Escape stalling issue for some time now, but this investigation appears to be larger in scope than before.
Though not a recall yet, NHTSA's Office of Defects Investigation (ODI) has received 123 complaints of stalling or surging vehicles, while Ford itself has logged 1,472 complaints. The investigation report, which is posted below, seems to indicate that a faulty circuit board for the throttle body could cause the vehicle to go into limp mode, which, according to NHTSA, could cause complaints of both stalling and surging.

Junkyard Gem: 2007 Mercury Mariner Hybrid

Once hybrid vehicles from Honda and Toyota proved to work well in the real world of American streets during the early 2000s, other U.S.-market manufacturers climbed aboard the gasoline-electric bandwagon. Ford introduced the Escape Hybrid for the 2005 model year and sales proved quite strong; its Mercury-badged sibling, the Mariner Hybrid, appeared the following year. The Mariner Hybrid never induced many vehicle shoppers to sign on the line which is dotted, despite gasoline prices going absolutely ape in 2008, though it remained available all the way through the Mercury brand's 2010 demise. Here's one of those rare trucks, found in a Denver-area yard last month. The Escape/Mariner Hybrids got amazing fuel economy for tall, truck-shaped machines, though the serious penny-pinchers with long commutes skipped anything built in the 21st century and began driving up the prices of the once-scorned Geo Metro XFi, gas-sipping champion of the previous decade. The Mercury brand was on the ropes by this time, with not much to distinguish the once-distinctive Mercury machines from their near-identical Ford counterparts. The 1999-2002 Cougar was the last Mercury sold here with no twin brothers over in the Ford showrooms. I do see the occasional Escape Hybrid in places like this, though such gas-saving small SUVs tend to retain their value well enough that it takes a crash to retire one. This Mariner Hybrid hit something hard and either flipped on its side or scraped a guardrail for some distance. The airbags deployed and, presumably, spared the occupants from serious injury. That's the good news. The bad news is that fixing this kind of damage to a 13-year-old vehicle made by a defunct brand just isn't worth it to insurance companies, hybrid-electric powertrain or not. We can assume that the battery pack lives on in another Escape/Mariner. Navigation, Bluetooth, and other features that were considered pretty slick in 2007. This truck was in pretty good shape until the very end. Jill Wagner proved that you can bury a Mercury emblem in volcanic soil and it will grow into a brand-new Mariner Hybrid. That's how science works! You can go to the same field and tap on a Mercury emblem, if you want to get a regular gasoline Mariner. Featured Gallery Junked 2007 Mercury Mariner Hybrid View 20 Photos Auto News Green Mercury Automotive History Crossover SUV Hybrid mercury mariner mercury mariner hybrid Junkyard Gems