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01-01-2010, 05:56 PM
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#11 |
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Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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DFCO doesn't make a noise, and it doesn't rev the engine or downshift an automatic transmission. There's just a sudden slight deceleration as the idle fuel is cut off. You have to be paying close attention to feel it.
There is a separate function in the ECU that downshifts the transmission if you're coasting downhill and apply the brakes. It increases the "engine braking" so you don't have to use the brakes as much. Touch the gas pedal and let it off, and it'll upshift to high gear and let you pick up speed coasting. |
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