I'll try to explain this the best that I can so that maybe someone can explain what is taking place to me.
I have the TRD Supercharger with the URD 7th Injector kit. Also have the 2.2" pulley, Doug Thorley headers, new cat's, new o2 sensor and afr sensor along with innovate motor sports o2 sensor and a magnaflow cat back exhaust.
During normal driving, IE: maintaing 70mph i'm running almost exactly 2100 rpm's (automatic) and the AFR on the gauge is showing between 14.6-14.8. Pretty much ideal from my understanding. This is all assuming that I'm running on flat ground. (Also in North Dakota and elevation is approx 2000-2200' on average.)
The problem that I'm having is that when it comes to a hill, not really anything major, but just a decent incline, as long as i try to maintain 70 the truck seems to do ok. If i give it just a touch of gas, enough to hold the speed the AFR seems to run at 13.0-14.0 Which is still fine. The problem that I have is when i give it enough to gas to pick up speed (to pass someone), but not enough to actually downshift to 3rd (i'm assuming this is the torque converter kicking in/out) I go to about 2800 rpms and the AFR drops to 12.5-13.5 but after about 5-7 seconds the RPM's drop to 2500-2600 and the AFR goes to 15.5-17.0. This is what i'm concerned with. I'm not sure why this happens and the AFR will hold at this lean mixture until i let off the gas completely and then when I get back on the gas it goes back to 14.7. Unless of course i get back to the 2800 rpm area and it drops rpms and leans out again.
The motor shouldn't be under to much of a load there, not like I've got my foot to the floor during this time. I don't hear any pinging when it leans out, but i do run premium fuel with every tank and it's not like the RPM's are very high.
I haven't done very much WOT to see if the AFR drops quite a bit because I'm waiting to get the IPT valve body upgrade done so I don't toast the trans. Basically been babying the thing since I put the supercharger on it.
Is this a normal thing, or do I need to see about going through and tuning it. Is it possible I wired up something wrong on the AIC and it's not working properly? Any way to check this?