Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Why is my idle higher while coasting than when I'm stopped?

saand · 10-07-2010, 06:22 PM

I agree with euromodder, the ECU or a mechanical device will raise the idle when the car is cold. I have also "fixed" this in my car.
for anyone interested i have written up in the wiki for how to reduce the cold start idle
Cold Start idle reduction - EcoModder

and the warm engine (standard) idle
Car idle reduction - EcoModder

for me both mods caused noticeable reductions in fuel usage but my engine seemed to be designed to rev fairly high when cold.
I have also never stalled with these mods (except when i stupidly put the car into drive from neutral when i have forgotten to turn off the torque converter lock up)

10-07-2010, 06:22 PM	#10 (permalink)
saand Wiki Writer Join Date: Jul 2010 Location: Melbourne, Australia Posts: 236 bugler - '91 Mazda 626 90 day: 35.89 mpg (US) Thanks: 15 Thanked 25 Times in 22 Posts	I agree with euromodder, the ECU or a mechanical device will raise the idle when the car is cold. I have also "fixed" this in my car. for anyone interested i have written up in the wiki for how to reduce the cold start idle Cold Start idle reduction - EcoModder and the warm engine (standard) idle Car idle reduction - EcoModder for me both mods caused noticeable reductions in fuel usage but my engine seemed to be designed to rev fairly high when cold. I have also never stalled with these mods (except when i stupidly put the car into drive from neutral when i have forgotten to turn off the torque converter lock up)