Get a big flat blade screwdriver with an acetate handle, put the head hard up against the body of the fuel injectors, put your ear on the end of the handle, have someone crank it and see if you can hear the solenoid in the injectors clicking through the handle of the screwdriver.
Confirm for fuel injector pulse with an LED test light/circuit tester (must be LED)
If its a single lead test light, connect the tail to positive terminal on battery and probe the earth wires on the injectors, the light should flicker if you have injector pulse while cranking.
If its a circuit tester which can show earth and positive, it should have a positive and negative terminal to connect to the battery, you can just probe the injector wires and it will show you either positive or earth, the earth will be the one that flickers.
You should have an ignition positive on one wire of the fuel injectors, the one which will determine if they're firing is the earth as that's what the
ECU controls.
Usually these 1990s setups will have a
CKP in the
distributor, it uses this to determine engine position, it uses this to control fuel injection and spark, if you have no
CKP you won't have injector pulse.
Does it have spark?