new set up - jumpy

I just installed the 1st BL system. 8XL, 12020, MPI CVD's, Porline shocks, everything else is stock - including the receiver. It is pretty jumpy - meaning when I give it throttle it just skips around. The servos work fine, so I think the receiver is ok. I twisted all the lines, put the receiver in the back - and that helped. Any suggestions? I added some pics. Thanks!