Van was driving good. When I stopped for a few minutes, van would not crank again. Starter turns over as is suppose to. Fuel pump is working. Spark off ignition coil is good, but pulses. Spark at spark plug seems weaker. Engine will not ignite and run. Scratching my head because I'm running out of options. Was told it was a bad Crankcase Sensor, so I replaced it. When I replaced the ignition coil, it acted like it wanted to start for just a fraction of a second. But back to nothing.