2011 rzr800. to start off i started riding about 10 mins everything died, replaced the fuse where the 30 amp and 20 amp are in the left rear wheel well, started hard and ran on one cyclinder, died and blew ecu/efi fuse under the dash replaced that and doesnt idle. I took the injectors out and when you cycle the key only the back injector opens, i swapped the injectors and still only the back injector opens, when i turn the key on the back injector harness gets 12v the front only gets 8volts, I checked the ecu plug clean and tight. what is my issue