Checked the injectors are receiving power with a multimeter?
The injectors always receive volts so simply turn the ignition to the on position and check with a multimeter.
The ecu earths the injectors to trigger them so obviously shove the neg of the multimeter on the chassis/battery.
Runs on 4.. Are you sure the plugs just arn't fouled.. Thats what a mate of mines did for a while we warmed it up, raised rev's and she cleared up.