Car not starting

Ok ive had this problem for a while now the first time it stopped I replaced the front 3 plugs with bosch platinum plugs and it started up and ran for a while now it wont run at all I replaced all the plugs with bosch platinum plugs and also ngk plugs and still nothing I know its getting fuel when I pull the plugs they are wet or they smell of fuel so im thinking it might not be firing properly I tried the old way of checking spark by putting the plug up next to the body and havent seen a spark since it has coils on the plugs im stumped someone was telling me it might be the cam sensor I dont have the money to buy testers or take it to a shop so any help would be great