Rocketman is correct, the ignition system is operated independently from the ecu.
When you turn the ignition switch to the run position, do any dummy lights turn on (check engine, airbag, or battery indicator)?
Have you checked the 15A "Engine" fuse located in the fusebox under the dash? This fuse directly provides switched +12V power to the distributor's IGN module, the ATX module(if it's an automatic),and turns on the main fuel injection relay. The wire is black/white stripe.
If you have +12v at the distributor's black/white wire when the switch is in the run position, you should see the tach bounce when cranking the engine.