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.