Hello mate

Can you hear your fuel pump at all?

When you turn the key it should prime for 1-2 seconds. FRST's have a "limpback" mode, which means incase of a fault, the engine will run with compromised performance and economy, using the EDIS4 module as a standalone device.

If the fuel pump should stay on permentantly when the key is turned this is a BIG give away of what is more than likely an ECU fault.

Personally i doubt its the CPS as u wouldnt get spark otherwise, the CPS is the only thing that allows the management to produce the spark.

I'd say maybe u have an injector fault/wiring fault. Check the multi plug for the injector loom, also check that the ecu hasnt had water leaking on it and that the ECU plug is firmly secured in place.

And ive now just noticed you think its the fusebox so ill post this anyway but you will probably just ignore it lol