P0304 misfire, wont crank.

hello, my parents 99 old intrigue with almost 200k miles on it started sputtering. after pulling over it wouldnt crank over. we got a code P0304, cylinder 4 misfire. the fuel filter, plugs and wires were replaced about 6k miles ago. we pulled the plugs out they were fuel fouled, but each of them was getting a spark. we checked to make sure the plugs were getting fuel from the fuel bleeder valve, and it was. we were thinking of replacing the coil for cylinders 1/4 but dont want to spend the money if that might not be the cause. any help would be appreciated!

you can swap the coils 1/4 to 2/3 & see if the miss follows the coil

we just tried that, still wouldnt crank, and the ODB found no codes. we reset the code when it first happened, and we can't get a code when we have the coils in the original spots. any other suggestions? perhaps a timing chain?

if the engine wont crank you need to start by check the battery,starter,cables ect.
making sure battery is fully charged & the cables are clean tight would be a place to start or do you mean engine cranks over but wont start??

it cranks but wont start. we charged the battery, clean non-corroded connecters. the guy at autozone also mentioned that it could possibly be a crank-shaft position sensor or possibly a cam shaft position sensor. ever hear of those going bad and causing a misfire?