check spark plug gap.then test to see if theres spark. Its really simple if you have someone helping.
With all plugs screwed in, unplug one of the wires from a plug and have your friends crank it, not too long or you'll burn out the starter. while cranking, hold the wire with the tip about 1/2 - 1 inche away from the plug. you should be able to see a spark arc across to the plug.
Maybe the fuel pump is going bad, I don't know.