93 Lumina Z34 runs tell it is warm and dies

I cant find the crank sesor is it by the trans of dampener on front, I was driving down the road and it died after 15 min it started but only went one block and died changed filter and did not help I went back 4 hours later and got in it and it made it home 8 min drive pulled in drve way and it died so my friend sayes it needs a crank sensor mybe, I have it but whare does it go. Any help please O yA it has a 3.4 dohc I did test the plug wire after it dies and thare is no spark