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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:

Volkswagen e-Co-Motion concept poised for delivery to Geneva

With Nissan getting ready to launch the e-NV200, it appears Volkswagen is looking to go after the same zero-emission commercial vehicle market with the all-electric 2013 e-Co-Motion Concept. Debuting next week at the Geneva Motor Show, the e-Co-Motion Concept might be small in size, but VW says it has cargo and payload capacities that should be perfect for small businesses.
Measuring 179 inches long, 75 inches wide and 77 inches tall, the e-Co-Motion Concept has about the same footprint as the current Golf, and it has a cargo capacity of 162 cubic feet and a maximum payload of more than 1,700 pounds. There isn't too much information on the e-Co-Motion just yet - such as what electric components and platform are used - but the press release posted below states while the concept is shown as a cargo van, future body styles could include a passenger wagon or a refrigerated box van.

2016 VW diesels are still 'months' out

Many 2016 model year vehicles are already for sale at dealers in the US but none of them have Volkswagen's 2.0-liter TDI. Don't expect to see the diesels on lots for several months either. The Environmental Protection Agency is preparing an onslaught of evaluations on the engine to make sure that it doesn't get fooled again, Automotive News reports. Before the new tests can even begin, VW must resubmit the 2016 diesels to the EPA, and the company isn't saying when that might be. The automaker took back the models' previous application after telling the EPA about an undisclosed software feature, according to Automotive News. There was absolutely no evidence that this was another defeat device, but the emissions agency wanted more information about what the tech's effect was. EPA boss Christopher Grundler has been quite clear about not disclosing any details about the new tests. He doesn't want to give automakers a chance to create more defeat devices, and the agency intends to evaluate diesels from other companies with more rigor, too. That process is already beginning in cases like subjecting the 2016 Chevrolet Colorado Duramax to on-road emissions checks. Once the 2016 VW models are certified, the EPA intends to run the same tests on the proposed repairs for the company's earlier diesels. That process could take months, as well, according to Automotive News. VW CEO Matthias Muller recently said that the first recalls likely wouldn't happen until January.