truck wont start!!! help!!

[jethro]

my truck wont start it will crank over for a long time but just will not catch fire idk what to do or where to start! truck is a 96 350 with the 10K mod, k&n intake and a 3in dp.

first thing to check is check to see if its getting fuel.

[jethro]

i can smell the fuel coming out of the tail pipe and it blows white/gray smoke while cranking over

[SCUFFY828]

need to get a scanner on it and look for codes , also need to read data with a scanner and see what it doesnt have , rpm signal, oil pressure , things like that , just because you see some smoke and smell fuel doesnt mean it has fuel pressure either

^^^^^ what he said ^^^^^

[firefighter254]

plug it in and see what it does brother

[jethro]

quick update i tested both batteries and one failed so i went and got 2 new ones from advance auto put em in truck cranks over much better but still wont start i also pulled the fuel filter and it is full of fuel looks clean and filter does not appear to be clogged. i would put it on a scanner but i dont have one i think it might be the glow plug relay it was really hot the other day when i had the same problem the night before and now it is cold to the touch does not warm up at all

[jethro]

if the glow plug relay went bad could it take out the glow plugs with it? i am still fairly new to this

[Austin G]

You don't need glowplugs to start it. I think.

[jethro]

really??? it is still about 45 here i thought that i needed them to start the truck if not then y are they there lol?