'92 caravan no start

recently flashed up van and she ran fine at idle for 20 minutes. slight rev on engine and vehicle quit... plenty of fuel, good battery... no spark.. checked wires but ignition coil showed only 500 ohms. replaced and still no start.

Any help

Check your timing Belt. Water pump caused timing belt to go on my van, no spark cause camshaft stoped. We also got a lower reading for the coil. Let me know how it turns out