91 Octane

I have xHP stage 3, sometime the car would jerk at 5k rpm and it won't shift to next gear

3rd and 4th gear surging 6.5k+

V7 = sea level tune V8 = start of new 4500' tune All pulls done 55 degrees, 4500ft, new plugs, coils, walnut blast.

Hey guys I really need some help figuring this out. My car gives up power when wot. It mostly gives up in 3rd gear however does happen in other gears as well just not as often. It loses power at around 5,000 rpms when doing pulls however in normal driving it does not. What can this be? I was doing a pull today actually and went through 3rd but once I was in 4th it gave up around 4,500 rpms and I got a epc light. Please help!

3rd gear log .