LS vtec - injectors pulls, and then they don't??

hey I have having a problem with the injectors. I have know idea but this is what the car does. the injectors will pull, and then they don’t and when they don’t the car dies. I thought it might be the ECU so we switched out the ECU and it still did the same thing. So we think it is the wiring but me and my friend don’t know what could be wrong with the wiring does anyone know what it could be. The injectors are 310cc injectors for my ls vtec. Let me know asap. We don’t know what else to do.
thanks