16v ECU acting up code 12s with jumper engine won't start

[fixkick]

with the clip inserted, in the diag pins, and it dont start. did you, (does this hot and cold engine?)

1: try 5% throttle while cranking when it dont start , Diag jumpred.
2: check for spark, like , is spark gone?
3: if sparks ok, like that, then try "test fuel"? spray, start now? if yes how long it run or not at all. and with 5% right foot throttle?

these tests, prove what's up. for example is sparks gone, like that, then the ecu is bad.

why not look inside the ECU.? here are the steps.
http://www.fixkick.com/ECU/ECU.html#Removal_of_ECU:


pin 2 to 4 right? jump? not wrong pin... if you have 4 pin DLC then use. B to C pins, type DLC im search box.

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all clues and test matter.
like above. to prove a bad ECU.
and ECU that is crashing is random, the symptoms can be very obscure to total death. (noise on the main internal 5vdc logic bus, is bad news)
I think your ECU is first ever to do this, not start , DIAG jumped
most others the CEL is dead (llamp never glows)
or diag dead full time no matter what.
or 12s come out then die, then came back or misfire.
the not start issues is a first for me, and i scan vast numbers of forums world wide to see the, the odd , is interesting to me.