Could be two causes - no fuel, or no pulse signal
Pulse signal can have a number of causes.
You need 12V to the injector on 'run' and on 'start'. you should not have it when the key is off. It seems you have this.
The ECM needs to ground the other wire to the injector. It could be the quad drivers in the ECM are shot, but there are a lot of other things to check first. Usually you get no ECM pulse because the ECM doesn't know it should be pulsing.
The most common cause for this is the purple wire isn't getting a crank signal. The purple wire should be connected to the starter solenoid so when you hit the key to start it gets 12V.
If that's hooked up right you should get a measured pulse that will get the engine to start. if it dies right after the problem is in the distributer signal.
If you have no fuel to the injectors, the problem is either the pump, pump signal or lack of fuel. (it does have fuel, right?
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This is really easy to check. Crack the line on the back of the TBI unit and cycle the key to on. It should spray fuel for a few seconds, then shut off. If it does not, check for power at the pump. If you have power at the pump for those few seconds, then you need a pump. If you don't, then you have a relay or relay signal problem.
The relay should get power from the ECM when the key is turned to on. It will run for a few seconds before it sees a crank signal. If it sees a crank signal it will run while cranking and a few seconds more. Once the car is getting oil pressure, it will run continuously until it looses oil pressure or the key is turned off. So-check the power out of the relay. If none is present, check the power going in. If that's good, check the trigger power. It should come on when the key is on or when cranking. ALso check the ground for the relay, just because.
The oil pressure sending unit bypasses the relay when the engine has oil pressure. It doesn't do anything on cranking or for a few seconds after.
If that doesn't get it, post up and we'll go from there.
