whats wrong?

[1989CCD]

1989 crew cab 454 4X4 was driving on freeway last night then all the sudden started to feel like i was running out of gas started to sputer and back fired a few times and then just died it has gas in it i just changed fuel tank switch and fuel filter and fuel pump. it just turns over and wont start now thought maybe was the coil so i replaced that and still nothing but when i put new coil in theres one wire that wasnt hooked to anything see pics when i removed old coil any one know what this wire goes to? and any other ideas of what my prob could be its geting gas but wont start any help thanks guys.