wont start but turns over strong???

Do I HAVE to beat the dead horse, LOL?

Compression, spark, and fuel.

Since you are having recurring trouble, you should get "set up" for this. Get a spark tester from the auto store, and a bag of clip leads from Radio Shack (and a multimeter)

Hook up your spark tester, "hang" it so you can see it through the hood gap and crank the engine USING THE KEY.