I have been running about 15.5:1 at cruise, trying to improve milage. I don't like the way it runs, as if I'm always going against the wind when cruising. So I put back to closed loop to see if it runs better, I'm pretty sure that it does.
But I noticed how different B1 and B2 were. At first it was always, but it seems the computer has cruise figured out, and it only shows up during light acceleration. It was giving B1 a lot more fuel than B2. I did a cylinder balance test, they were 93, 94, and 95%.
Does this mean that B1 is lean in open loop? Or maybe misfiring? (No misfire DTCs.) Could this be the cause of my mid-range KR ever since I super-sized my engine and injectors at the same time?
My wide band is in the drivers side, by the way.

 

can you post up the log, it is kinda hard to tell just by a pic...

 

Here's one from a couple of days ago. It's long, check when I'm cruising at 65.

 

Swap the O2 sensors from side to side and see if it follows... If it does, then it is a lazy O2 sensor... Swap your injectors from side to side to see if it follows, check each oring for tears... This will rule out a vacuum leak on the injectors orings and a sticking/clogged injector... Also it might be an intake leak... Just my .02...... The 25% trim is definate sign that something is wrong....

 

It's not that it's 25%, it's that the side that is 25% is 10% more than the other side, isn't it?
I mean, isn't it adding fuel to bring the tune to 14.7:1 instead of the 15.5:1 I had it adjusted to?
I like the idea of swapping sensors because of the work involved to switch the injectors (removing the blower). I'll try that, but if one were lazy, wouldn't its graph go up and down at a lower frequency than the good one? Just asking.

 

Sorry I that is what I was implying...