[brucepick]

It's coming back to me now - I went through this back in January so it's been a while. When I started using MMO I didn't have LB easily always, at first. I only noticed that it was easier to get LB and at speeds below 62 mph, and it got easier with more miles driven.

My big frustration before MMO was I needed 2300-2500 rpm to get AND KEEP Lean Burn. I had rarely seen LB below those rpm's. It only happened when the gods smiled on me. But things got a lot better through the first tank or two with MMO.

On the third tank I forgot to add MMO. No more low speed LB. I pulled over and added some, started back down the interstate, and after the requisite two miles I had low speed lean burn again.

To get into to LB you'll need:
Engine warmed up
Two miles driven at highway speeds
No EOC. That restarts the two miles "clock".
TPS below 20 or LOD below 65
RPMs ABOVE approx 2400 or 2500
RPMs above aprox 1800, after MMO has cleaned up whatever it cleans

To KEEP LB you need:
RPMs limits as above, depending on if system is using MMO or not.
TPS below 32. Below 29 at slower speeds. (is a sliding target)
OR - LOD below 92, pretty much regardless of speed.
That's why I like LOD now. More consistent to use.

S-L-O-W increase in pedal depth (throttle) after you get LB, or you can lose LB. Once you get experience you can more easily push down accelerator to its LB limit after going into LB, without losing it.

GOOD LUCK! More miles with MMO = easier LB, at least for my car.