My 96 Civic stalled while going about 30 MPH as I was shifting gears; it will not restart. When I check for a spark at each cylinder, the spark is intermittent and varies in intensity. As the engine cranks, the spark goes from nothing to good to very weak. I've changed the usual items: distributor cap, rotor and ignition wires. Would the igniter cause the engine to suddenly shut down and not restart? Would it cause an intermittent spark and one that varies in intensity? I would greatly appreciate any advice.