First, pull all your plugs and let the fuel evaporate from your combustion chambers. Did u check for spark? If you have fuel and compression then it has to be spark related. Maybe your igniter (coil) inside the distributor is pooched. While your in the distributor check your cap and rotor. is it dirty or worn? is there condensation inside (water)? How old are your plugs and wires? are the plugs gapped correctly? Check and post with results.