-Make sure engine is earthed well
-Make sure igniter is earthed (bolted down to car body)
-Check you have power to coil/igniter
-Check you have spark
-Check you have power to injectors
-Check you have power to ecu
-Check fuel pump operation
If you have removed dizzy, make sure you have installed it correctly (ie timing marks all lined up).
If the motor is old and sitting for a while, it may need some start ya bastard to get it going before the injectors free up and operate normally.