View Single Post
Old 02-22-2010, 07:39 PM   #34 (permalink)
rmay635703
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,891

Silver - '10 Chevy Cobalt XFE
Thanks: 506
Thanked 868 Times in 654 Posts
Quote:
Originally Posted by ahanix1989 View Post
Is there any way to determine when my engine is in "open loop" mode? Is there a certain trigger I can tap into?
A scanguage or OBDII reader can determine this. As for doing it yourself, best to just get an MPGguino assembled, they don't cost much and work well. It takes a computer to really determine what your OBDII is doing real time, can't really watch voltages.

Also on Dodge Open Loop is sometimes better than closed when the motor is cold, my truck is affected by temperatures dramatically, when cold my MPGs are 50% of when warm and when warm but not quite up to temp my FE floats about 25% lower than fully heated.
  Reply With Quote