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Old 07-18-2013, 03:41 AM   #1 (permalink)
Join Date: Oct 2009
Location: South Central AK
Posts: 933

escort - '99 ford escort sport
90 day: 42.38 mpg (US)

scoobaru - '02 Subaru Forester s
90 day: 28.65 mpg (US)
Thanks: 32
Thanked 146 Times in 97 Posts
throttle tap to initiate DFCO

Noted something a while a go and have been looking for it lately. When engine braking (with a down shift) I have noted that my Subaru does not always enter DFCO, even at higher RPM. However, when lifting off even at lowish RPM it always enters DCFO.

When coming down hill and down shifting if I don't feel computer has cut fuel or note that it is still in closed loop I can blip the throttle and it will go open loop and zero fuel consumption immediately. The "blip" is not even enough to feel, just enough for the computer to see a change in throttle position.

I will have to check for this in the escort.


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