My s2 wont start after standing for 4 years. Does anyone have any suggestions as to why it won't run? Its getting fuel and spark

The fuel was off so drained that out and put fresh in and it still wont play ball.

The only time it will run is when the black plug for the secondary air valve is plugged onto the cold start injector and if the blue cold start injector plug is plugged onto the secondary air valve Im assuming this is just pumping fuel into the inlet manifold?