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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:

Automakers drop support for Trump effort against California emissions

WASHINGTON — Toyota, Fiat Chrysler (now known as Stellantis following its merger with Peugeot) and other major automakers said on Tuesday they were joining General Motors in abandoning support for former President Donald Trump's effort to bar California from setting its own zero emission vehicle rules. The automakers, which also included Hyundai, Kia, Mitsubishi, Mazda and Subaru, said in a joint statement they were withdrawing from an ongoing legal challenge to California's emission-setting powers, "in a gesture of good faith and to find a constructive path forward" with President Joe Biden. The automakers, along with the National Automobile Dealers Association, said they were aligned "with the Biden administrationÂ’s goals to achieve year-over-year improvements in fuel economy standards." Nissan in December withdrew from the challenge after GM's decision in November shocked the industry and won praise from Biden. On Monday, the Justice Department asked the U.S. Appeals Court for the District of Columbia to put the California emissions litigation on hold to "ensure due respect for the prerogative of the executive branch to reconsider the policy decisions of a prior administration." Biden has directed agencies to quickly reconsider TrumpÂ’s 2019 decision to revoke CaliforniaÂ’s authority to set its own auto tailpipe emissions standards and require rising numbers of zero-emission vehicles, as well as Trump's national fuel economy rollback. Asked to respond to the automakers' action, White House climate adviser Gina McCarthy said in a statement that "after four years of putting us in reverse, it is time to restart and build a sustainable future, grow domestic manufacturing, and deliver clean cars for America." California Governor Gavin Newsom praised the automakers on Twitter for "dropping your climate-denying, air-polluting, Trump-era lawsuit against CA" and urged them to join the voluntary framework. TALKS WITH BIDEN Separately, an industry trade group on Tuesday proposed to start talks with Biden on revised fuel economy standards that would be higher than Trump-era standards but lower than ones set during the prior Democratic administration. The Trump administration in March finalized a rollback of U.S. Corporate Average Fuel Economy standards to require 1.5% annual increases in efficiency through 2026, well below the 5% yearly boosts under the Obama administration rules it discarded.

Bosch fuel pumps spark recall of 2015 Golf, GTI and Audi A3

A few weeks ago, BMW and Nissan both issued recalls for some of their vehicles to replace Bosch-supplied fuel pumps. The pumps had nickel plating that could flake off and cause a failure. Volkswagen Group is the latest automaker to be affected by the problem and has a campaign for the 2015 Audi A3, VW Golf and GTI. In total, 6,204 units of these models are in need of repair. The problem with the VW Group vehicles is identical to the previous recalls. It's possible for the pump's nickel plating to come off and cause increased friction. Eventually, this can result in the component's failure. According to documents from the National Highway Traffic Safety Administration (as a PDF, here), there are no reports of accidents or injuries from this issue in the VW Group models. Bosch spokesperson Linda Beckmeyer tells Autoblog that these vehicles don't all necessary share an identical fuel pump, but the parts all use the same plating process. The problem also prompted repairs of the 2014 Ford Escape several months ago, she indicated. When asked if the issue could prompt more campaigns, Beckmeyer said that she "can't speak to that" because automakers decide on the recalls. Owners should receive notice of the problem soon, but according to the NHTSA documentation, there currently aren't enough pumps to fix all of these vehicles. "Bosch is working closely with automakers regarding replacement parts," Beckmeyer said. When available, dealers will replace the components free of charge for affected customers. Related Video: RECALL Subject : Improper Plating may cause Fuel Pump to Fail Report Receipt Date: APR 17, 2015 NHTSA Campaign Number: 15V229000 Component(s): FUEL SYSTEM, GASOLINE Potential Number of Units Affected: 6,204 All Products Associated with this Recall Vehicle Make Model Model Year(s) AUDI A3 2015 VOLKSWAGEN GOLF 2015 VOLKSWAGEN GTI 2015 Details Manufacturer: Volkswagen Group of America, Inc. SUMMARY: Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2015 Volkswagen Golf, GTI, and Audi A3 vehicles. Improper nickel plating of components within the fuel pump may result in the fuel pump failing. CONSEQUENCE: If the fuel pump fails, the vehicle will not start, or if the engine is running, it will stop and the vehicle will stall, increasing the risk of a crash. REMEDY: Volkswagen will notify owners, and dealers will inspect the vehicles and replace any affected fuel pumps, free of charge.