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Old 10-07-2010, 04:47 AM
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Scarsman Scarsman is offline
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Default Re: downhill on gear fuel consumption

I agree with Hellz, if all fuel was cut off, then the engine will stop. To prove this, try coasting down hill and turn off the key. Your tach will drop to zero and the engine is dead. If "gravity" and the tranny spinning were keeping the motor turning, then it would keep turning when the key is turned off, but it wont.

Now if you have a manual transmission, then it is a different story. Now you have a mechanical link between the motor and tranny, and as long as the wheels are turning the tranny, then the engine will also be turning. Not so with an auto. Other wise you would be able to roll start an auto like you can with a manual. But you can't. Roll a dead auto down hill and put it in drive and nothing will happen.
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2005 H2 SUV - Stealth Gray with Ebony interior - Third row - Exterior tire carrier -
Mirror caps - black bedliner
Roof rack rails - black bedliner
Wheels - Black bedliner on stock wheels
Gas cap lid - still chrome but will soon be black bedliner
Tail light guards - still chrome but will be black bedliner
Grill - Still chrome but will be black bedliner
Hmmmm, is there a pattern developing here?
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