First try disconnecting the PC from the system to see if that changes the problem.
It it's PCIIIUSB, there are only two connectors and negative lead.
If it's a PCIIIr, then there's the same two connectors and negative wire, but also the red connectors used for the pulse generator sensor near the alternator.
If that doesn't fix the problem, check if your plugs are fouled.
Clean or replace the plugs and check if you're getting a spark to the plugs.
Also, lift the tank and check the vacuum hose going to the Fuel Pressure Regulator mounted at the rear of the throttle body assy.
With the fuel system primed, if you see fuel dripping from that FPR fiting, you regulator diaphragm is bad and the FPR will need replacement.
Be careful lowering the fuel tank! The main wiring harness routes very close to the lower edge of the tank and the frame.
It is very easy to pinch the harness causing broken wires.