OK - i've searched all the forums i can find - this is certainly not an old topic, but i have a problem that seems to defy all the previously posted ideas & solutions
this is an '89 engine and DME harness, and the DME is from an '88, said to have run fine when swapped into a test car
The engine will fire & run about 3 seconds - then dies (as if it is out of fuel) -
I have correct fuel psi, and have even jumpered the pump to assure that it is still running after startup to assure continuing fuel psi
I have already run thru the entire DME Test Plan - everything checks out to spec,
I have already tried all the ideas in Loren's posts, et al
the injectors show OK with noid lite
it will always fire on Carb-cleaner
it will initially fire on it's own injector gasoline supply on first start attempt, but then dies and only cranks - won't fire again
jumpering the Temp II sensor makes no difference in this behavior, and the sensor tests good
I have tested every DME wire from end-to-end; all ignition wires etc test OK in all ign switch positions, the tach works when it fires (but not when cranking), the oil gages work, etc
etc etc -
Is this where I admit to being frustrated? 
I have read on a couple posts about cases of corrosion or cold-solder in DME, but have not yet opened it up to look for that
I
do have another 3.2 ('84) and will try
swapping the AFM even tho the current AFM tests OK per the Test Plan
swapping the DME
I will also be checking the cold start valve to see what it is doing
and i will be trying an old solution of running on a propane feed to see if an extended fuel supply keeps it running (i have those propane tools from 'way back when i worked on american iron)
i am looking for more ideas
???? - oddball stuff that some of y'all have only seen & solved once ????
I should mention that i have a factory 1984 test plan - dunno if there would be any change for the 89, but i also have Bentley, and a full factory manual on CD, & will check for anomalies
TIA