1991 jimmy with 4.3
she don't run! drove died , restarted drove 10 feet died now she don't start now, I have 150 psi compression, new fuel pump had fuel at throttle body, spark looks weak is a yellow color not blue like it should be.
do you think it is the coil or ecm? motor has 160k does not even try to start

Check your flux capacitor.

Check your flux capacitor. Nice...:rolleyes:

I'd check the coil first, with that kind of miles it's not unlikly for the coil to go south.

Check your pick-up inside the distributor too.