'97 2.2L base Cavalier idles rough and randomly stalls

check timing, adjust valve clearance, check vacuum leaks. these are some that need attention.

sounds like the fuel pick up tube inside the tank is loose or maybe the filter is clogged. also low fuel levels will do this

run fault codes to find the faulty sensors

Mass air flow sensor is probably going bad or has fouled from bad air from lack of maintain a clean air filter and filter box, or is sucking foul air into the system after the air filter.

Not much you can do without troubleshooting the problem. It could be a crank sensor, ignition module, low fuel pressure, a vac leak, or a list of other things.
Usually if you have a sensor problem you will get a check engine light, but not always.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Hello... Where to go next depends on how the Evap Gross Leak was fixed... Post it...

Thx.

check the park switch for wire problems

Have they checked your TPS sensor as this is the most common cause for rough idles and stalls...

WEll it is possible it could be the idle air control. one the most comon problems is the fuel pressure regulator. To check it find the fuel rail the fuel regulator will have one vacuum hose on it remove the hose and check to see if it is wet with fuel if not have some one trun the key on or start the car if it leaks fuel out the regulator is bad. This would explain why its hard to start when it sits because it floods out the motor