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Nissan Quest under investigation for inaccurate fuel gauges

After receiving 12 complaints in the last 14 months, the National Highway Traffic Safety Administration has begun a preliminary investigation into a fuel gauge issue with the 2007 Nissan Quest. Drivers have reported that the fuel level gauge will show there's gas in the tank when there actually isn't - in two cases, the digital distance-to-empty gauge indicated more than 70 miles of remaining range - and it will stall out.
This is the second time the 2007-model-year Quest has been involved in the same fuel gauge issue. In 2010 Nissan recalled seven models, including the Quest, from the 2005-2008 model years because of faulty fuel readings. The 12 vehicles in this latest complaint could have slipped through the cracks then, but we'll find out more when NHTSA updates its progress with the investigation into the estimated 37,656 units.

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.

Nissan not shuttering Leaf EV battery plants, at least not yet

The big news on the electric vehicle front today is that Nissan is considering slowing down EV battery production in the US and UK and source all of Nissan's big packs come from Japan. Nissan may also buy some batteries from the Korean company LG Chem. This is apparently causing dissent within Nissan, but it follows what Alliance partner Renault is doing in the hunt for 180-mile EVs. This change – officially denied by Nissan – raises a lot of questions here, since Nissan made a huge deal about building the Leaf pack in Tennessee a few years ago. In fact, the car's big price drop was due, in part, to localizing battery production. If the company is really going to give up on building the packs where it makes the cars, then does Nissan not see itself as being capable of producing an energy-dense battery cheap enough to compete with Tesla and its Gigafactory and GM (which, of course, has long worked with LG Chem on batteries)? Whatever Nissan decides, it needs to be ready to compete in a market that offers a $35,000, 200-mile car by 2017. "We have not taken any decision whatsoever to modify battery sourcing allocation." – Renault-Nissan's Rachel Konrad Nissan would not comment directly on the reported change, but Rachel Konrad, the Alliance's global director of communications and marketing told AutoblogGreen, "The Renault-Nissan Alliance remains 100 percent committed to its industry-leading EV program. This global commitment continues for the foreseeable future, and we have not taken any decision whatsoever to modify battery sourcing allocation. Nissan has no plans to impair its battery investments. Beyond that,we will not comment on speculation or anonymous sources, and as a matter of policy the Alliance does not confirm or deny procurement reviews." There's a point-of-view where it doesn't matter where the batteries come from if the resulting EV is competitive, price-wise. Renault CEO Carlos Ghosn, after all, said during a recent Twizy test drive that the battery is a means, and the objective is the car. In the end, Nissan is saying it has no near-term or medium-term plan to shutter plants in US or UK and CEO Carlos Ghosn says, "What's important to us is that electric car performance fully meets customer expectations." Whatever's going on, Ghosn has seen three top executives leave the Renault-Nissan family recently.