02 7.3 hard start
 

just bought a 2002 7.3 powerstroke and it seems to crank a lot before it will finally start as soon as it starts it runs rough for 1-2 seconds and then runs great, if you turn the key back on as soon as you shut it off it will start right back up but if you keep the key off for more then 5 seconds it cranks for 8-10 seconds, its got a 6.0 starter and a superchip the higher hp tune seems to crank more then stock just wondering if anyone knows any cures? thanks