My car is doing the same thing. The engine won't start it just cranks over. I have checked for spark and nothing, I don't think I am getting fuel either because I crank it take out a spark plug and it is dry, Shouldn't there be some fuel on the plugs after cranking. Also my IAC makes a humming sound when the key is on, then I will hit ti and it will make a whirling sound? Anyone please help us.