Im working on a 1984 buick skyhawk 1.8 liter with about 100000 miles. The car had stopped running and the coil was replaced as well as the distributor cap and wires. The car started briefly and then stopped running all together. I checked for spark from the new coil and there is none. Ive seen this exact same problem on a 98 ford f150. What is the cause of this.