1988 Ford Bronco

I have a problem with an 88 bronco loosing ignition spark, plenty of battery power etc. Just shuts down while driving or after sitting for a while and no spark. Used a test plug still no spark. Wait a few and the spark comes back. Happens very intermittenly. Replaced the coil and the TFI-IV ignition module still the same thing. Any other ideas/thoughts?

cps sensor.