Starting issues
 

Have a 1994 mercury grand marquis and when i drive for 15-20 miles and then turn off car it wont start back up unless i let car sit for a couple hours and then fires right up, have tried to have code read and the guys reading it keep saying its not showing anything and i think thats cause they dont know what the hell theyre doing. ive got three kids and a sick wife and need help with this problem, have been on oradside twice because of it. Thank You