2 bar co3 tune

[aaronr]

I been running truck in open loop all winter and now want to put in sem-closed loop. When I put in sem-closed loop the truck runs lean. When the truck in open loop it run right where it need to be. So do need to start loging the short fuel trims to get dialed in? Here is my log file sem-closed loop and open loop log. Let me know what you think.

[aaronr]

bump!!!!!!!

[aaronr]

I guess no body knows

[5.7ute]

Have you tried raising your 02 switch points in the lower modes.(B4105) 450mv is stoich which you wont hit until around 92 G/sec (B4107)

[dc_justin]

Have you tried raising your 02 switch points in the lower modes.(B4105) 450mv is stoich which you wont hit until around 92 G/sec (B4107)

That is precisely why he's slightly leaner than stoich at cruise.

[aaronr]

That is precisely why he's slightly leaner than stoich at cruise. Thanks Justin I got your e-mail about this.
I just want it little bit richer than what showing. I just like to see between 14.7 and 15.1. In the log files there spot where it's 15.6 to 16.0. Now the only other problem is when start the truck a/f lean's out to 16 to 17. It does it on cold start-up and already warm start-ups.
Thanks guys