Chrysler Repair: No spark, No fuel, No codes; 93 voyager, plymouth voyager, engine cranks

Question
1993 plymouth voyager (base model, calif) stopped running while being driven.
No codes, No 55, no fuel pressure.
Fuses and fusible links OK; power going through all of them.  
Checked ASD and power is going to it and out of it.
No power to coil.
Engine cranks over.
Car has already been to an independent mechanic;.. he thinks it needs a new ECU; since he can't pull a code either. (The car has now been sitting for 3 months and the battery is dead from a dome light being on.)
I checked most everything I could from reading posts on this site. What am I missing?
Does it maybe need a new ECU? (Blue wire going to ecu has power.)
Thanks-Ken

Answer
Hi Ken
There is something fishy here. The ASD will close for about 1 second when you turn the key to "run" position and you should hear the fuel pump run inside the tank for that moment. And you should get 12V on spark coil primary supply for 1 second. Then nothing. Then if you try the starter you should see the 12V to the coil and the fuel pump should start up again WHILE you are cranking (but you may not be able to hear it) for as long as you are cranking. See if that happens or not for a full 5 second crank. If so, then there is something wrong with the spark driver circuit from the ecm if you don't actually get spark either. If you do get spark and you have fuel pressure while you are cranking then it should start unless the mixture is way off. You didn't mention which engine you have but the 2.5 and 3.0 have distributors, while the 3.3 has a coil pack. So it would be worth checking that the rotor is turning if you have the distributor.
If you don't get 12V to the coil when cranking for 5 seconds, then I would suspect that the ASD is not closing OR that there is no spark timing signal coming from the distributor (2.5/3.0) or the crank position sensor (3.3) although ideally that would cause a code. It could be the sensor is borderline, not good enough to generate a spark/close ASD but not bad enough to set a code.
So see if you are or are getting 12V to the dark green/orange wire at the coil/coil pack while you are doing a 5 second crank. Then let me know and tell me which engine you have.
Have you checked the battery ground leads (body near the battery, on the engine cylinder head)?
Fortunately I have the '93 shop manual with wiring diagrams so we ought to be able to figure this one out.
Roland