90's mercury villager no start
 

ok so my friends mercury villager 94 i think wont start
it cranks just great but wont start
the first time it happened we just wiggled this fuze labeled inj so im assuming injector, it started then

the next time it happened we cleaned off the coil wire and it started

now it is doing it again and idk why it wont start
i have verified spark with my timing light

i still need a second person to crank as i use my mechanics stethescope to see if i can hear the injectors pulsing and also to listen for the fuel pump to turn on

i just put some heet in the gas tank
it is in the twenties here right now


so im just lookin for some tips and tricks on what to do in these situations
thanks
jared