We are starting to eliminate almost everything here, so to re-cap again - its beginning to be like Apollo 13 - just tell me whats good on the spacecraft:
We have the fuel pump running and confirmed pressure in the rail at 36psi.
The fuel rail has been pulled and on crank only delivers a tiny ammount of fuel - not enough for it to run.
The tank has had fresh fuel in it.
The tach bounces so we are assuming that the speed sensor is transmitting.
Both the speed and reference sensors have resistance within tolerenace.
It runs on starting fluid so the DME controller must have power and the DME must be getting an input from the speed and reference sensors to provide the spark at the plugs at the correct time.
We have a low resistance connection from the DME relay to the feed on the injectors so the car wiring to the injectors is good.
With the DME controller out there is an open circuit to ground on the DME controller connection to the bottom of the injectors so no short.
The DME relay has been removed and jumpered as per Clarks instructions so is not a factor.
Did I miss anything?
So we have all the conditions at the DME to make the engine run - on starting fluid we have confirmed that the DME ignition timing is good so the sensors are not an issue. All thats left is the "ground" connection from the DME controller to the bottom of the injectors which is supplied by the DME controller. Thats an interesting one as te NOID light flickers suggesting a connection, but the voltage levels can only be confirmed with an oscilloscope.
Its begining to look like the controller but that doesnt make sense given that it was just a compression test. If you can get a scope (hire one?, borrow from local college?) and see what the waveforms are doing across the injectors we might have more of a clue. Or borrow a spare controller and swap it out. If it can fire the plugs at the right time it should be able to spray fuel.
If it comes to it there's schematics for the controller at -
http://www.cannell.co.uk/Technical%20Articles/ML31TAU.pdf and
http://www.cannell.co.uk/Technical%20Articles/ML31TDU.pdf.
From there both pins 14 and 15 are connected together internally and driven by the same circuit so all injectors are firing together. That makes sense as theres no camshaft sensor on the car.
The faults more likely to be on the car though.