I have the shudder, stutter under load that comes with misfit plug wires, etc. When I pull the wires and reinstall them I get the same thing, slightly different. For example, the initial problem may be a rather violent shudder. When I pull and reinstall the wires its more like a "popcorn fart." It changes. However three sets of plugs wires, new plugs and plenty of dialectric grease later, it always seems to be there. My question is whether something else may be amiss that would make this happen? Failing coil pack perhaps.