2000 accent stalls

2000 accent stalls after running for about 15 mins. let cool down and will run fine. I think it is the crank sensor. Loses spark, unable to check for signal, unsure how. any ideas would be great. I think it's a common prob.

I forgot to mention that once it stalls it wont re start at all. crank no start, no spark.

i would first check the coils, test them and the test the crankshaft sensor.

go there;

http://www.hmaservice.com/

register and then look in the service database for you car, it'll explian how to test the CPS and Coils.