GRA wrote:The interesting thing will be if the fact that their diesels' are regularly reported to exceed EPA hwy mpg ratings in the real world is due to this.
As a designer of performance chips for Mitsubishi cars, I have always wondered how these manufacturers are getting such high mpg without increasing NOx. When you look at the charts, as you lean out the Air-Fuel Ratio, hydrocarbon output goes down, and gas mileage rises, but the NOx emissions increase, which is why they picked the 14.7:1 AF Ratio years ago, as a compromise between the two. My friend with a newish Jetta has always bragged about his great mpg, almost as good as my Prius when driving 70 mph, which told me they must be running the car VERY lean.
make them fix all previously sold diesels (e.g., make them meet the 2016 standards or pull them off the roads, being forced to buy them from every owner).
My friend knows that any fix for his Jetta is going to effect gas mileage and performance, so he says he will refuse to take it in for the modifications. I'm supposing that will be the reaction of most owners, so how do you force them to fix their gross polluter? If the car is newer, they could deny you warranty coverage until you get it fixed, but what about all of them that are out of warranty? I can't see an easy remedy for this, but I hope that VW doesn't get off with a simple hand-slap.
At $35,000 fine per car, they should just take them all back, crush them, and give the people a new VW that does meet emissions.