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Aggressive Deceleration Fuel Shut-off


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Also in the Ford Fusion/Milan.

 

Aggressive Deceleration Fuel Shut-off. The 3.0-liter V-6 also regulates its gas consumption by using aggressive deceleration fuel shut-off for an efficiency improvement of approximately 1 percent. When the driver releases the accelerator pedal to slow down, the system temporarily turns off the fuel. The flow of fuel seamlessly resumes when the vehicle reaches a low speed or when the driver accelerates again. The system uses the transmission to keep the engine running at a low, more efficient operating point whenever possible. This system will be added to the 2.5-liter lineup later in the 2010 model year.
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Had a diesel super duty that did that at least three years ago. Going down a hill it would get quiet, touch the pedal and the rattle would be back. First time I ever saw/heard of it. Even if you take foot off throttle at 60mph and then step on it again you got a rrrr.....rrrr....rrrr

Say three years ago and the truck was fairly new so a 04-05 SD diesel.

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