Did you try to get into fastboot and restore from there ? Theres a thread with the images of stock 4.3and how to do it...
Same thing happened to me, got into fastboot (Vol Down + Power) and restore stock using ADB, and everything is fine now
EDIT 1: Theres this tool, but ive heard that sometimes restore does not work, but maybe thats already fixed ( http://forum.xda-developers.com/show....php?t=2635706
EDIT 2: And here it is how to restore stock Moto G (the link for thestock images fof specific carriers/country are there too), just remember that the fastboot commands can change from one carrier to another (Mine didnt had system spacechunk1/2/3, just 1 system file --> http://forum.xda-developers.com/show....php?t=2542219
Hope this works, and if this is not your problem than at least i give it a bump lol
Enviado desde mi XT1032 mediante Tapatalk
Device: Moto G (Stock 4.4.2; Faux Kernel 005u; Xposed + Gravity Box + MotoGuide)