My 1997 Toyota Corolla cranks fine but wont start

What is your question?

I have check for spark, gas, i have change new plugs, wires, filter distributor cap and new rotor also i put in a new valve cover set because i notice some oil on the first and third spark plugs holes. When the motor died out and wouldn't start up i notice some smoke coming from the air filter box which that comes from my injectors. Any other suggestions that can help me to get my car to turn on again please.

What makes this problem better or worse?

can not get the car to start up

How long has your 1997 Toyota Corolla had this problem?

started on monday