Seems you have both vacuum and fuel system issues.
Vacuum problem classic symptoms would be the system defaulting to defrost mode, AC controls being dead and the rough idle you have experienced. You have a leak somewhere. Inspect and retest the lines, including the T and Y connectors as well, and don't forget the vacuum reservoir and lines under the battery tray. Give them all a good shake while doing it.
Fuel system issue is evident from the hard starting which suggests loss of fuel pressure. Typical cause is bad fuel regulator (which is a mechanical device and not controlled by the computer) , injectors leaking down, failing fuel pump, leak somewhere in the fuel lines or a combination of some or all of these. The low fuel level warning, which you say is inaccurate, is triggered by a signal the computer is receiving from the fuel pump wiring. Have you checked the wiring harness and other fuel connections on top of the fuel tank? And did you recheck the fuel pressure as freedom in 4 low suggested? It should be steady in the high 40's while engine is running and while the engine is off it should remain there as well for hours on end.
Other things to consider is an intake manifold leak, leaking throttle body , or IAC as has been suggested earlier.
Vacuum problem classic symptoms would be the system defaulting to defrost mode, AC controls being dead and the rough idle you have experienced. You have a leak somewhere. Inspect and retest the lines, including the T and Y connectors as well, and don't forget the vacuum reservoir and lines under the battery tray. Give them all a good shake while doing it.
Fuel system issue is evident from the hard starting which suggests loss of fuel pressure. Typical cause is bad fuel regulator (which is a mechanical device and not controlled by the computer) , injectors leaking down, failing fuel pump, leak somewhere in the fuel lines or a combination of some or all of these. The low fuel level warning, which you say is inaccurate, is triggered by a signal the computer is receiving from the fuel pump wiring. Have you checked the wiring harness and other fuel connections on top of the fuel tank? And did you recheck the fuel pressure as freedom in 4 low suggested? It should be steady in the high 40's while engine is running and while the engine is off it should remain there as well for hours on end.
Other things to consider is an intake manifold leak, leaking throttle body , or IAC as has been suggested earlier.