Not sure why my van won't start. It turns over but won't start.

1. Check if the distributor is turning. If not, the timing belt is broken. 2. If the distributor is turning, the timing belt may have jumped.

ARE YOU SURE THE PROBLEM IS SPARK AND NOT FUEL? YOU DIDN'T SAY THAT YOU CHECKED FOR SPARK. JUST CHECKING. SINCE YOU MENTIONED CAM AND CRANK SENSOR I DON'T THINK THIS ENGINE HAS A DISTRIBUTOR OR A TIMING BELT! CHECK ASD RELAY, OPEN WIREING OR FUSE LINKS. NEED TO HAVE ANOTHER SCAN TEST WITH A BETTER SCANNER. ALSO CHECK ENGINE LIGHT SHOULD COME ON WHEN KEY IS ON!!! I DON'T THINK YOUR COMPUTER IS GETTING VOLTAGE AND/OR GROUND. SINCE NO REPLY FROM YOU MAY BE WATER IN GAS TANK!!!!!

check to see if you have fuel pressure

you need three thing to run, spark,fuel and compression. which one are u missing?