For some reason your injectors are getting a constant ground signal. They are hot with the key on and the LH ECU controls the ground side. If that driver in the ECU is shorted to ground the injectors will simply stay on and barrel fuel through them as fast as the pump can push it. It is possible that the ECU is bad but the more likely culprit is the harness. It has been years since I have seen one do it but, in the harness under the intake manifold there is a splice where all of the injector grounds come together. I have seen a harness deteriorate to the point where that splice shorted to ground and kept the injectors on continuously. There are a couple of connectors under the brace that runs from the firewall to the passenger's strut tower, under that brace you need to find the 8 pole connector that has a gray wire in the #7 position, leaving the connector connected, pop open the back side of it and slide out wire. Turn the key on and if it continues to barrel fuel then your problem lies between the injectors and that wire connector (i.e. it's in the harness somewhere). If you turn the key on and it no longer runs the injectors well then it is being grounded somewhere between the connector and the ECU, most likely the ECU. Check it out and let us know.

Mark