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Old 08-31-2008, 04:01 PM   #46 (permalink)
Wannabe greenie
Join Date: Aug 2008
Location: Yorba Linda, CA
Posts: 1,098

The Clunker (retired) - '90 Honda Accord EX sedan
Team Honda
90 day: 29.49 mpg (US)

Mountain Goat - '96 Ford Ranger XLT 4x4 SuperCab
90 day: 18 mpg (US)

Zippy - '10 Kymco Agility 125
90 day: 65.03 mpg (US)
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Originally Posted by MetroMPG View Post
Ah, now I see what you're asking.

Your car already has a feature called Deceleration Fuel Cut Off (DFCO). I'm not exactly sure what your specific RPM threshold is for this state to be active, but it's likely your fuel is already off under those conditions.

Build yourself an MPGuino, and you'll know for sure!
Yeah, I'll have to do that. As my speed drops, I eventually start hearing a slight burble from the exhaust, indicating to me that at least a little fuel is getting in. My one key-off test indicated that I could get all the way down with the key off, except for about a 4 second light 5th-gear acceleration after a particularly sharp corner. Having the fuel cut off the whole way seems like the way to guarantee that I don't use a drop of fuel the whole way down.

Seems like an MPGuino should be my second mod (after a vacuum gauge, that is.)

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