86 GMC with 79 Chevy 350/350 drivetrain slightly modded been running for 8 months with new drivetrain. No issues, has been running great. Two weeks ago engine shut off while going 40 mph, no warning, no gauge issues, alt fine, oil pressure fine, good gas. Just died. Pulled off the road, towed home. Been sitting ever since. Cannot get any spark at all. At the time of running an Excel blueprint distributor, coils, cap, rotor, ECM. Checked ignition fuse first. Good. Replaced all ignition components, coil, cap, rotor, ECM. No spark. Checked all wiring no shorts. Checked volts at distributor with key on and got 12 volts. Checked volts at the distributor while cranking and got 9 volts. Changed steering column ignition switch, still no spark. Changed distributor even though pickup coil tested good. Still no spark. Ran hot wire from battery + post to distributor and jumpered starter post to crank engine, still no spark. Check plug wires and have continuity on all. Pulled cap to verify rotor rotation and have it so timing chain and cam good. What am I missing. I know I am getting old but never seen this in all my years of mechanic work.

 

Have you tested your ignition control module?
The same thing happen to me and that was the main culprit along with bad o-rings on my injector heads.

 

On the pickup coil, did you physically lift it out, and check the insulation?

 

Hey Anthony, I read your post concerning a "no spark" condition while I was looking for the answer to the same problem you describe. Did you ever find the answer to solve the problem? Please let me know because it's had me baffled for a week now. Thanks for any help. Phil