1988 with 4.2, won't fire. Replaced distributor, distributor cap, rotor, wires, plugs, and coil. I have power going to coil and coil tests normal, yet no spark at the plugs. Shouldn't there be spark between the coil and the distributor cap? There is none? I ruled out ignition control module and ignition switch as I am getting power to coil. Am I correct? Thanks in advance.