I'm siking out 17 afr when i start the truck. It goes into sem closed loop at frame 960 and at 950 hit close to 17afr. Any help thanks.

 

you are posting these on the efilive forum correct? Some of those guys are pretty good. Ive never gone closed loop, in over a year.

 

yea i'm posting on the EFIlive site as well. I picked up another 1 mile per gallon going sem-closed loop. I've been open loop for a long time and trying to go sem-closed loop.

 

interesting. I may have to look into that.
Can't help your problem, but Free bump

 

bump!!!!!!!!

 

bump!!!!!!!!

 

I guess know body knows.

 

There used to be a glitch in the COS3 a while back. Did you update to the newest version of the COS3? The glitch was that the pre-temp enrichment table was not enriching . Make sure you have the newest version of COS3.....here are the links

http://forum.efilive.com/showthread.php?t=9175

http://forum.efilive.com/showthread.php?t=4285

 

How do tell if have lates one??

 

If I were you, I would just update your COS with the newest one found in the newest version of the software. That way you know you are good to go.