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A fix and buyback program for Audi V6 diesels may be on the way

While Volkswagen reached a settlement to buy back 2.0-liter diesel inline-fours with emissions defeat devices, the roughly 80,000 cars with 3.0-liter diesel V6s built by Audi have yet to be addressed. But a new report from Bloomberg indicates that a solution is near. The publication says that sources familiar with the situation say the company has a fix ready for the majority of the cars, and that the EPA and California Air Resources Board are ready to approve it. According to Bloomberg, this fix would involve a software update and would work for about 60,000 of the Audi A8, Q5, Q7, Porsche Cayenne, and VW Touareg models with the engine. The rest of the vehicles won't be fixable without major modification, so those would have to be purchased back from the owners. Bloomberg does point out that approval from the EPA and CARB are only one piece of the puzzle. The publication said that this deal has yet to be approved by owners of the cars and the Federal Trade Commission, both of which may demand that VW offer a buyback to all owners, even those whose cars can be fixed. The good news for owners of VW products with this engine, is that they should have some closure pretty soon. And owners that still like their diesel V6 can take solace that they might actually be able to get them fixed, as opposed to owners of the 2.0-liter diesels. VW offered buybacks to owners of all 475,000 cars with the turbo four-cylinders, or a fix when it's available. However, there have been no signs of an approved fix. Related Video: News Source: Bloomberg via Automotive NewsImage Credit: Sebastian Blanco Government/Legal Green Audi Porsche Volkswagen Diesel Vehicles vw diesel scandal audi diesel

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Submit your questions for Autoblog Podcast #344 LIVE!

We're set to record Autoblog Podcast #344 tonight, joined by Doug DeMuro, author of Plays With Cars, formerly of Porsche Cars North America, and all-around swell guy. You can drop us your questions and comments via our Q&A module below, and we'll give them extra-diligent attention. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #344
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