View Single Post
Old 09-08-2008, 03:59 PM   #6 (permalink)
cfg83
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
zx3zetec -

In my Saturn, at highway speeds, the "neutral idle" RPM is higher then my normal idle. My normal idle is between 800 and 900 RPMs. At highway speeds, the idle is usually between 1000 and 1200 RPMs. We have deduced that the ECU/PCM is changing the setting of my Idle Air Control valve because it is seeing higher MPH.

As long as your coasting-in-neutral RPM is lower than your coasting-in-gear RPM, then it's a win. But, not as good as it could be, .

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote