my car randomly cuts off while riding down the road and it will not crank. on 2001 Lincoln Town Car

it turns over,but will not crank..ive had it towed home twice and the next day it crunk up. ive replaced a couple coils an the problem still occurs.what could it could it be?

Asked by for the 2001 Lincoln Town Car
poss ignition breaking down, seek diag and est
ive had it plugged into the code machine at auto zone an it read a mis fire on spark plug number five...replaced the coil an it stopped for like a week so hopefully after i take it to the shop they will be able to tell me exactly wat it is...thanks for replying