If fuel is not coming from the injector lines either your metering head is dead or the idle mixture is way to lean and just needs adjusting up a bit.
Try turning the idle mixture screw 1 full turn clockwise and seeing if fuel comes out the injectors, if not i'd say metering head is dead. If you say that it only trickles out when you press the flap down i'd be thinking it is the metering head anyway.