I've read a bunch of stuff and havent found a
solution to my problem.

Here is the problem. The van starts fine when it
is cold. It also starts fine if it's been running
for 7-10 minutes or less and I turn it off and
restart it. But, if I run it for longer and turn
it off it won't restart. It turns over just fine
but just doesnt catch. The only way to get it
started is to roll start it. If I do roll start
it, it runs just fine. If I wait half an hour or
more to let the engine cool it starts.

Any suggestions?
-Andrew