Can someone please review my datalogs and ebl file and help me with what I am doing wrong.
The truck is a 454 30 over, multiport fuel injection, 44lb injector,10.5:1 compression, oval port alum head, and 226/234 @50 cam.
I have the truck running well with good afr in open loop but as soon as i turn on closed loop the truck is instantly leaner. The 2 logs I am posting up the only change is activating closed loop. I have been racking my brain for months now with this.
Here are links to the files because i can not upload here.

https://www.dropbox.com/s/x4e5c2fksj...ning_00153.bin
https://www.dropbox.com/s/x5spm0jps1...rst%20test.xdf
https://www.dropbox.com/s/w2z7jzrt7s...closedloop.dat
https://www.dropbox.com/s/a74ge4si9w...13openloop.dat

 

In open loop the commanded AFR is typically lower (richer). In closed loop the ECM targets stoich, which is going to be leaner then in open loop.

The proportional gains are too high. Reduce the "PRP - Gain vs O2 Error" table by about 15%. Can see that they are too high as the INT is rapidly oscillating along with the O2 overshooting.

RBob.