A 1990 astro mini van backfired and stalled changed fuel filter turns over will not start?

fuel filter doesnt seem to be the problem. check continuity on the fuel pump or fuel pump relay. the relay is probably the best bet. best of luck I had similar problem with my 90 Astro. To fix I eplaced distributor cap and rotor. your Astro may also need a new ignition module which you will locate under the distributor cap. Good luck.