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so the problem is that vw purposefully lowered engine performance during the test. they could have done that on the road, and been within spec, but then their c
by adgjlsfhk1 5y ago
so the problem is that vw purposefully lowered engine performance during the test. they could have done that on the road, and been within spec, but then their cars would have felt sluggish, so instead they just made their cars lie during the epa test
- hef19898 5y agoVW detected a test cycle and turned emissions treatment, Adblue and some other things, on. When on the road, these systems were tuned down or fully turned off.
- contravariant 5y agoFrom my limited understanding it wasn't just lowering engine performance they couldn't be simultaneously be efficient with fuel and low in emissions (IIRC burning at a higher temperature is good for fuel economy but bad for other pollutants). It's very well possible that no single configuration could have made them meet the requirements.