Hello and thanks for using Just Answer.I will try my best to help you with your question.
You need to check and see if you have lost spark or fuel causing the problem.
The fuel can be checked at the schrader valve on the metal fuel lines for the fuel injectors. It looks like a tire valve stem. Push the needle valve down and see if you get a BIG spray of fuel.
As for spark, remove a plug wire from a spark plug and attach spare spark plug or remove the one from the engine and attach it to the plug wire and place it on metal ground. Crank the engine over, you should get a bright white/blue spark.
Let me know what element is not present, fuel or spark.