crap i just realized i uploaded the wrong log file... I will correct that when i get home..

 

In closed loop, the PCM will utilize fuel trims to be sure that you're not going drastically lean. Appears that it will learn trims in the LC region before allowing it to activate.

 

yeah all I have is gas receipts. LOL I would set tune up to run lean and just watch gas receipts for a week. I mean we are talking minimum gains or losses. Don't get me wrong, I have never found huge gains from lean cruise and I understand driving differences day to day would certainly efffect any reports. And I typed to quick earlier, looking through my receipts and notes, 15.7ish was about as good as i could get it. After that there was no difference and looks like I was losing mpg at 16.5.

 

I added the correct log to the top.

 

Some asked the question about having a greater TPS while crusing here are a couple of MAPs i did to show the difference between regular 14.68 driving and > 14.68 (i used filters to get the data.

First up are TPS

Regular (Commanded 14.68)


LC (Commanded > 14.68)


Second MPH

Regular (Commanded 14.68)


LC (Commanded > 14.68)

 

I don't get it, all I hear about is running the engine with throttle as far open as possible to improve mileage by reducing pumping losses. Maybe it's in the ignition advance, it needs to be something wacky to get better mileage at 16.6:1 ?

 

maybe this is where spark dwell could play a roll? IDK but I never put alot of effort into it because, well...I get 10mpg and run 11 to 12's in the 1/4 mile...I have come to accept gas can't be a concern with my setup LMAO......