I had the same problem with my 1981 350 L81, no spark and would not run. It had previously died randomly and then finally would not start at all. During the process of returning the car to service after 33 years in storage, a new ignition coil was installed in the HEI ignition. There are two grounds on the coil, one on top of the coil where the black wire attaches and the other is on the bottom of the coil where it grounds to the car. The new coil had a thick paint coating on the metal plates which was not removed in the two ground lug areas. Once the paint was removed in the ground lug areas, the car started and ran fine. What I think was happening was the ground lugs had just enough of a ground in the painted areas to let the car run intermittenly but would occasionally loose the ground and the car would just quit. Changing the module, radio supressor capacitor, and rotor had no effect. But when the paint in the ground lug areas was cleaned off, it had a good ground and ran fine. I now have a sign on my work bench stating "Before you spend any money chasing electrical problems with new parts, make sure the battery is good and all grounds are good". I already knew that but did not follow that advice on this problem, hence the sign.




|UPDATED|11/29/2017 9:06:21 PM (AZT)|/UPDATED|