DEAD 1990 Full size (350c.i.)
 

Ran fine. Starter arced, replaced. Ran fine, then cranks but no run. Tested> weak or no spark, AND injectors not pumping ((Fuel pressure great @ throttle body.))

--Replaced Ignition Module (under cap) -old one tested fine but repl. anyway.
--Bought pickup coil> but havent installed yet. DONT WANT TO KEEP THROWING $$$ AND/OR TIME INTO IT.

>>>>>>>ANY SUGGESTIONS APPRECIATED<<<<<<<<

Did you have the coil tested?

I have seen a bad ESC (electronic spark control) module cause a similar issue (weak spark and no power to the injectors).

BTW, I have moved your post into the appropriate section. Please try to post questions in the tech sections relevant to the vehicle and/or type of problem you are working with.

the ESC went out on my 1990 K5 and once i replaced that its ran awsome ever since