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VW Jetta TDI dyno shows HP loss trying to recreate cheat mode

Volkswagen is working on a fix for diesel-engined vehicles that are out of compliance with emissions regulations in the US and other countries. We're told that engineers will be presenting a solution internally sometime this month, but that doesn't mean we'll actually see it in the wild this month. One big question we have about the coming fix is, will it affect the car's performance? That question relates to another we have about the engine as it is: How much performance would the 2.0-liter diesel lose right now if it were turned down to pass US emissions? The Fast Lane Car tried to sketch some answers by going to a shop in Denver, Colorado to run a 2011 Jetta TDI with a six-speed DSG transmission on an all-wheel-drive dyno. The thinking was that if you ran all four wheels the car would think it was on the road, whereas if you ran only two the car might think it's being tested. We'll get straight to the numbers: the stock sedan is quoted at 140 horsepower and 236 pound-feet of torque. When run with all four wheels turning it produced an uncorrected 114 hp and 214 lb-ft at the wheels. When run with just two wheels in motion the Jetta got 113 hp and 188 lb-ft at the wheels. Reading the graph, we're told that power differences between the two runs were as much as 15 hp and 32 lb-ft. You'll need to take some salt with these numbers, though, because the dyno and test protocol in the video are nothing like those used by the EPA. The shop attempts to trick the Jetta into 'emissions testing mode' by using the front wheels only for the two-wheel-drive run, but we have a feeling the software code at issue is far more sophisticated than that, since the ICCT, UVA, the EPA, and CARB investigated the situation for more than a year and couldn't figure out. Also, the technician adjusts for being a mile above sea level with a correction factor of 1.2 applied to horsepower and torque, which inflates the disparity in the final power differences over the two runs. Go to YouTube and read the lengthy comments on the video left by Andrew Price for a more thorough dissection of what could explain TFL's disparities. You can watch the video above, and feel free to try and dissect the results yourselves in the comments below. Related Video:

Who wants to pay a million dollars for a VW Beetle?

The Volkswagen Beetle was always envisioned as a cheap mode of transportation, but now one is being offered for over $1 million by a dealer in the company's home base of Wolfsburg, Germany. So just what makes this Beetle so special? It's not the first one made, and it's not the last one made – but it comes close: This particular example is an Ultima Edicion – one of the final Bugs made in Mexico before production ended even there in 2003. It's decked out in beige with a black fabric interior and none – repeat, none – of the bells and whistles. With less than 75 miles on the odometer, it offers one wealthy buyer the rare opportunity to get an original Beetle (not some modernized incarnation thereof) in factory-fresh condition, which no one has been able to do for over a dozen years now. Does that make it worth the million-euro ($1.1M) asking price? Not if you ask us, no. But then we wouldn't count ourselves among the most dedicated Beetle fanatics out there.

CARB found another emissions-defeating device, this time from Audi

The California Air Resources Board has discovered another emissions-cheating device on an Audi earlier this summer, reports German newspaper Bild am Sonntag. The device is different from the software found in the VW Group's diesel-powered engines, as it alters the way the cars' automatic transmission shifts. The latest device, according to Bild am Sonntag, measures how far the cars' steering wheel is being turned. If the wheel is turned less than 15 degrees, indicating that the vehicle is being tested in laboratory conditions, a program in cars with certain automatic transmissions changes the way the gearbox shifts. The change in the transmission allows the engine to produce less carbon dioxide than when driving in normal conditions. When the wheel is turned more than 15 degrees, the program automatically turns off, claims Bild am Sonntag. The paper reports that Audi took the software out of its vehicles, which was used in both diesel- and gasoline-powered vehicles in Europe and the US, earlier this May after CARB discovered the program on one of the automaker's older cars. Several engineers that were connected with the emissions-cheating device have already been suspended, reports Bild am Sonntag. As the German newspaper points out, the device, which is fitted to certain Audis with an automatic transmission, is different from the cheat devices found on the automaker's 3.0-liter TDI turbodiesel V6 engine and Volkswagen's 2.0-liter turbodiesel motor, even those were also designed to beat emissions tests. The 3.0-liter engine is found in the Audi Q7, Volkswagen Touareg, and Porsche Cayenne models. Audi didn't immediately respond to our request for a comment. Related Video: News Source: Bild am Sonntag via ReutersImage Credit: Reuters / Michaela Rehle Government/Legal Green Audi Volkswagen Emissions Diesel Vehicles vw diesel scandal