I am really happy with the way my truck is running for the first time since I put the new engine in back in May.

The throttle response is really a lot better and it seems to rip at part throttle. Will have to wait till the weekend before I get to experiment in the upper realms. Traffic to and from work is just too thick and the drivers too unpredictable.

I tried tuning the MAF but could not seem to figure it out so I gave COS3 a try. The MAF was not bad when I lowered the whole table along with the VE table by 10% but it leaned out by almost a point over 4400 rpm at WOT in PE mode.Also the tune ran almost as rich in daily driving as it did before I lower the MAF curve and VE table. Something in the stock tune seems to be adding a lot of fuel everywhere.

COS3 gave me a few problems at first but I have them worked out enough to fine tune it now without the urgency I seemed to be under before trying to get this truck running better since May.

The idle was better under the MAF until I tried to tune it and it started to stall all the time even when I put all the settings, except spark, back to stock. Under COS3 I did another RAFIG and raised the idle 100 rpm once the engine warmed up to 44*C in the whole bottom of B4603 Desired Idle Speeds. Idle speed is now 665 vs 575 stock. This seems to have solved the problem for the most part and while I still get the odd bump it has not stalled out yet.

Under the MAF throttle response was poor and in COS3, with 1 round of AutoVE, it seems to be very crisp and smooth in the transitions. The problem I had was it would go really rich quickly crossing 105 kpa and the truck would buck a little and bog out. I had to back out of it and accelerate really slowly to work through this area. I finally set the 100 kpa column of B3647 to 12.5 above 3200 rpm and set my PE to 110 kpa and a max of 11.5. Then I took the Boost VE table A0009, which is set really rich in the COS3 setup, and set the whole thing to 5% above the 105 kpa column for the whole table and the truck seems to really rock now.

I am relying on the PE for now unless it will not hold at WOT. I have no idea what would happen if I just relied on the B3647 and A0009 but I guess it might be quite lean. So now I need to tweak the idle a little if I can figure it out and definitely AutoVE the B0101 table a bit more and see if I can get the A0009 Boost VE Table to play nice.

Feeling much better about the whole deal now.
Thanks for reading and sorry for the long post.