Definitely need help, don't worry it's electrical

[Kevro_N_Chevro]

So after a good warm up idle, at times. The 88 suburban 350 tbi, with their code 42. Then run poorly. Sometimes the cheesy engine plug comes in at a stop light of in I5 going 70.
So did the back story. New distributor, wires, plugs, icm replaced after the distributor, New ecm map sensor, idle air sensor, egr valve, tbi rebuilt. I might be missing some things

However it will die randomly, through the 42 code. Restart and it's fine. Die this twice in a four hour drive last weekend.

I have been told to cut and spice two it the icm wires together to bypass the California emissions. However this old timer can not remember which two. Be thinks it's A and D

Please help as I want this as my DD and let the family have the mini van in shape of a SUV

 

[Vbb199]

New coil?

Optionally, do you happen to have any plug wires near the coil harness?
Is the actual EST circuit still in bypass? Theres that plug near the brake booster that needs to be plugged in. 1 wire.

A failing dist pickup can cause it as well.

Funny thought but have you reset the ecm (battery unplugged) since all these changes? You said you replaced distributor, i assume you mustve unplugged the EST bypass to set it.