im workin on a astro van that hasnt been drivin for a week and the problem is it has no spark. Turns over, has battery power, has gas,but no spark. I have no idea where to begin??

Start with the basics - how did you test for spark? did you use a spark tester?

-check your power coming into the coil - should have power when the key is in on position

-have you checked the distributor -> is cap, rotor and wires in good condition?

-if you are not using a spark tester you should get one, that is the proper way to really check for spark