My saturn is very hard to start ,like its not getting enough fuel. once it cranks it often surges, high to low rpms

Hmm, there are several questions left unanswered, such as when does it have a hard time starting, in the morning and what's the ambient temperature like atthat time, etc.

With the ambiguity of your situation, I can tell that it may be a variety of factors, including the possibility that either 1) the fuel pump check valve, 2) the fuel pressure regulator, 3) the fuel injectors, or 4) the fuel pump electrical circuit is malfunctioning, as found and nicely explained in a handy article at the following link:

http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Hard_To_Start_Morning_After_Hours.htm

As to the surging, up and down, there are eight probable causes of such a problem, as noted in this handy diagnositc article at this link:

http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Surges.htm

These articles should definitely help you.

Good luck,
Brad

If there is a Auto Zone not to far from you, have the car scanned for any DTC codes. That would help indicate what issues the engine may have that is causing your problem. I am leaning towards that you are having a MAP sensor problem, check the wire harness to the MAP sensor for corrosion or break in the wire. If you like, try disconnecting the MAP sensor and see if the engine starts, if it does. Is there any changes, if there is no change then the MAP sensor is bad. The other thing too that may do this is a BAD or dirty EGR valve, you can try cleaning it with carb cleaner or replacing it. IF you do go to Auto Zone, they will have the step by step instructions to the MAP sensor and EGR Valve replacement. Good luck and keep me posted, be glad to help

Change ildle air control valve/ sensor.