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Old 12-24-2011, 01:11 PM   #16 (permalink)
tru
EcoModding Apprentice
 
Join Date: Aug 2011
Location: FL
Posts: 126

tru - '05 Ford Focus ZX3
90 day: 39.46 mpg (US)

the truck - '02 GMC Sierra Denali
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Quote:
Originally Posted by wakie View Post
a lot of car do this
the idle speed is higher to avoid engine stall in case of hard braking
the ecu need the speed sensor to do this
0 mph = normal idling
by the way, if you coast to a stop let the car in fifth gear the engine goes in fuel cut off it is better for economy than idle
that is not true for the focus, at least an 05' manual
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