1991 Mercury Grand Marquis Gs Sedan 4-door 5.0l on 2040-cars

Auto blog

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.

Car Stories: Owning the SHO station wagon that could've been

A little over a year ago, I bought what could be the most interesting car I will ever own. It was a 1987 Mercury Sable LS station wagon. Don't worry – there's much more to this story. I've always had a soft spot for wagons, and I still remember just how revolutionary the Ford Taurus and Mercury Sable were back in the mid-1980s. As a teenager, I fell especially hard for the 220-horsepower 1989 Ford Taurus SHO – so much so that I'd go on to own a dozen over the next 20 years. And like many other quirky enthusiasts, I always wondered what a SHO station wagon would be like. That changed last year when I bought the aforementioned Sable LS wagon, festooned with the high-revving DOHC 3.0-liter V6 engine and five-speed manual transmission from a 1989 Taurus SHO. In addition, the wagon had SHO front seats, a SHO center console, and the 140-mph instrument cluster with mileage that matched the engine. When I bought it, that number was just under 60,000 – barely broken in for the overachieving Yamaha-sourced mill. The engine and transmission weren't the only upgrades. It wore dual-piston PBR brakes with the choice Eibach/Tokico suspension combo in front. The rear featured SHO disc brakes with MOOG cargo coils and Tokico shocks, resulting in a wagon that handled ridiculously well while still retaining a decent level of comfort and five-door functionality. I could attack the local switchbacks while rowing gears to a 7,000-rpm soundtrack just as easily as loading up on lumber at the hardware store. Over time I added a front tower brace to stiffen things a bit as well as a bigger, 73-mm mass airflow sensor for better breathing, and I sourced some inexpensive 2004 Taurus 16-inch five-spoke wheels, refinished in gunmetal to match the two-tone white/gunmetal finish on the car. That, along with some minor paint and body work, had me winning trophies at every car show in town. And yet, what I loved most about the car wasn't its looks or performance, but rather its history. And here's where things also get a little philosophical, because I absolutely, positively love old used cars. Don't get me wrong – new cars are great. Designers can sculpt a timeless automotive shape, and engineers can construct systems and subsystems to create an exquisite chassis with superb handling and plenty of horsepower. But it's the age and mileage that turn machines into something more than the sum of their parts.

NHTSA upgrades Ford floor mat unintended acceleration probe

According to a Bloomberg report, the National Highway Traffic Safety Administration has upgraded an investigation into complaints of unintended acceleration lodged against Ford vehicles. The investigation began in June of 2010 when just three complaints had been received and it only concerned the Ford Fusion and Mercury Milan, but this was at a time when the phrase "unintended acceleration" made grown men go pale. With 49 additional complaints received since then, the investigation has been reclassified as an engineering analysis - the last phase before a recall - and it has been expanded to include the Lincoln MKZ, making for a total of "around 480,000" units affected between the three sedans from the 2008 to 2010 model years.
The ostensible cause is that floor mats are trapping the accelerator pedal, but according to a Ford statement at the time, the entrapment is due to owners placing the optional all-weather floor mats, or aftermarket floor mats, on top of the car's standard floor mats. NHTSA has backed up that assessment, pinning the blame on "unsecured or double stacked floor mats."
On the face of it, it would appear that NHTSA has upgraded the status not because of Ford's error, but owner error, and Ford has stated publicly that it is "disappointed" in NHTSA's move. On top of NHTSA still being skittish after that other unintended acceleration debacle, it could be seen to be taking its time investigating all of the variables: it's reported that Ford changed its accelerator pedal design in 2010, a "heel blocker" in the floorpan has been considered a potential culprit in how the floor mats could be trapping the pedal, some drivers have said the floor mats weren't anywhere near the pedal, and according to a report in the LA Times, in "a letter sent by Ford to NHTSA in August 2010, the automaker said it found three injuries and one fatality that 'may have resulted from the alleged defect.'"