I have EFI issue.
Motor run for about 2-3 seconds then stops.
Keep cranking no go.
Then come back later motor run for about 2-3 seconds then stops keep cranking no go.
Have fuel pressure 44psi at the injector which all have been ultra sonic cleaned.
Have Spark.
 
Borrowed and change dizzy and ECU to see if any change nope same problem.
 
Does the engine start on the cold start injector only and then change over to the main injector as it warms up?
 
Checking the EFI Manuel there is a Start injector time switch.
 
Does this control the injectors when the main injectors come on or just switches off the cold start injector? I thought the motor would use the main injector with the cold start injector at same time on cold starts and then turn it off with the timer.
 
Need help
Been pulling out my hair over this problem. I feel like putting a bomb under it.
 
 
 

Can you keep the car running for longer if you apply some throttle?

No, it like it's not getting fuel. I squirted some fuel into the manifold it ran longer. I think injectors are not getting a signal to squirt fuel. This is on my Red 92 Hardtop I have with standard ECU etc. I sold the Black Mr2 Rob.

Circuit Opening Relay.

EssDub
Circuit Opening Relay.

Does this not control the fuel pump? There is fuel pressure.

After looking at it again and testing Start injector time switch which seem fine.
Held my finger on a injector when my helper crank the motor and I could not feel it squirting fuel.
Next job take off Solenoid Resistor and test that. 
 

I have taken off solenoid resistor and checked it out and it's out off it specifications. Maybe this is the problem.

I will swap it out and borrow a mate one to check it out.

News update on my progress, retested Solenoid Resistor with an omhs meter on the right setting and it in spec and 
Tested on Carmikeys car and it ran for 15min. So it's not my Solenoid Resistor. My injector are not giving the engine fuel. I got a syringe and squirted some fuel into the intake it ran until ran out. I tested the dizzy it gives a voltage when spun so the ECU should get a signal, Maybe it's my ECU or faulty wires to or from the ECU. It not a  fuel Resistor or Circuit Opening Relay all tested on a mates cars and it ran fine. I will test the ECU on my mate car tomorrow, I hope before he sells it.
 
Does anybody have some insight on this problem?

Not much to offer without thinking about it some more, but I would try and be more definitive about it being the injectors - try unplugging the 4 main injectors and seeing if the behaviour changes at all.