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Hi my name is Robert....
SO you are saying that there is not air pressure and you have dash power, but the engine will not crank over at all? Is the transmission in Drive or Neutral? Disconnecting the batteries would be something to try, sometimes that will reset the computers for the engine and trans. Does the engine service light come on for 5 seconds and then go out when the key is turned on? No light usually means no power to ecm. The starting circuit is seperate from ecm. If light comes on and goes off then listen to engine and you should be able to hear the injector solenoids clicking. If they are clicking then it is a fuel problem. If they are not clicking then it is the ecm preventing start. Check coolant level and oil level as these can both prevent it from starting. Robert