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Old 03-27-2014, 03:07 AM   #22 (permalink)
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Join Date: Mar 2009
Location: Tustin, CA
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2013 STi *SOLD* - '13 Subaru Impreza WRX STi
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90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
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Originally Posted by 101Volts View Post
Thanks. Here's a contribution: Downhill (If it's steep enough,) Putting the 2000 Dodge Caravan 3-Litre into low gear shuts off the fuel injectors.
Yes, coasting in gear activates Dfco. If you are going down a steep hill, dfco in gear is fine because you will not gain too much speed and the injectors shut off. However, dfco in gear is not beneficial with the pulse and glide technique on flat roads because you will lose too much speed on the glide, thus you have to pulse again too quickly.

Pulse and glide (engine on neutral coast) is the second best option when compared to engine off neutral coast.

I discovered that in my car, I can greatly improve the efficiency of the traditional pulse and glide engine on neutral coast by blipping the throttle during the glide portion. The fuel injectors appear to shut off for a split second every time I step off the throttle, therefore, by continuously blipping the throttle, I can keep the injectors off for a major portion of the glide, thus simulating engine off coasting, while keeping the car on.

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