View Single Post
Old 10-02-2008, 03:26 PM   #5 (permalink)
TestDrive
Master EcoModder
 
Join Date: Aug 2008
Location: South Dakota
Posts: 460

WonderWagon - '94 Ford Escort LX
Last 3: 51.52 mpg (US)

DaBluOne - '99 Ford Escort SE
90 day: 48.97 mpg (US)

DaRedOne - '99 Ford Escort ZX2 Hot
Thanks: 0
Thanked 15 Times in 4 Posts
A couple of things that may contribute.

Maybe the ECU's open loop fuel map leans out enough at the higher rpms to give better FE?

In any case, the engine is bound to warm up sooner at higher rpms allowing the ECU to go into closed loop sooner. And you're bound to get better FE in closed loop.
__________________
  Reply With Quote