I used a MAC Enhanced Scan tool to do these tests. I have been get CEL's for running lean. The main code is P0171 Fuel trim too lean. I wasnt sure if it is ST or LT but this is what I found.
At idle (900 rpm)
Engine temp. at 210 which doesnt change when moving
TPS - 12.2
I.A.T. - 142
IGN. ADV. - 2-5 degrees
MAP - 11.5 ("HG)
ST fuel - -0 to a -6
LT fuel - -1.6 both of these get more NEG. when driving
o2 (1) - 47 to a 56%
o2 (1) voltage - .2 to a .9
o2 (2) - 35 to a 67%]
o2 (2)voltage - .3 to a .9
These are all done in Global ODB2 mode

I dont believe the LT and ST fuel trim should be negative plus I wouldnt think they should get more negative as you gas it.
It also seems that the comp. doesnt go to or come down from closed loop in time.This could be because of the JET Perf.A/F mod. Also my o2 sensors seem to be fluctuating(sp)lol way too much. Shouldnt they be alittle more stable especially at idle? Also my I.A.T.was 142degrees. I was thinking of moving the sensor farther up the Iceman C.A.I. to get the sensor to feed more fuel. Those that have done it to Dakotas seem to be getting a 30-40 degree difference. Im not sure if any of this info will help you guys but I need help. Im looking at putting a stage 2 Hahns turbo kit in and I want to make sure I get this fixed first. Plus hell I just want it running correctly. Also I did clear the comp (SORRY). Help me stop running lean. Any suggestions would be appreciated. Thank you D.S. XICC