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A comment on Cummins pickup truck engines systematically tricked air pollution controls. Parent comment

Re:Cummins pickup truck engines systematically tricked air p... by sottol on Saturday December 23, 2023 @04:11PM (#38748283)
Used to be known as emissions cheating before VW, now it's emission fraud.

Imo every manufacturer does/did it for gas and diesel engines. I've heard of gas cars in the 90s assuming that they're on a test stand if you rolled down the window shortly after starting and kept it down and reduced power output. And stories like that.

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Re:Cummins pickup truck engines systematically tricked air p... by KennyBlanken on Saturday December 23, 2023 @06:05PM (#38749204)
I've never heard the bit about windows and I don't see how that wouldn't be very obvious in a pre-canbus car; "why does the ECU have a sense line to the driver's side window?"

What is easy is looking for the car to be started and then held at a raised idle. Once cars had traction/stability control, the ECU could look for mismatched front/rear wheel speed, or the steering wheel not being turned more than a few degrees.

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