throwing code after juice with attitude install
 

So heres my issue that i need help on, just installed a new juice with attitude with the cs monitor into my 03 ram 3500 on monday and everything went well. install went smoothly and was good as far as plug and play. started the truck up and idles smoothly, when i drive normally (calm on the throttle) the truck seems to act as normal. however, once i put my foot to the floor to see what shes got the truck starts to almost hop like im playing with the throttle. the other day i did it and it threw the code p1246 which is injector group 1 supply voltage/open. After clearing the code it will only come up and shut down the injectors in group one if i giver hell. once it tripped for group one and two but i cant make it do the 2nd group again even if i try. back on the stock tune it will not do it at all. Could it be bad injectors or do you guys think its the edge harness or something? any help is much appreciated.

Thanks, Don