1997 Saturn SL2 car hard to restart

I would try replacing the coolant temp sensor it's pretty common for them to go bad there located screwed into the head with two wires going to it a black one and a yellow one. Make sure u check the connector if it's corroded u need to replace it they usually turn green when they get corroded. Make sure u get a brass tipped replacement sensor the plastic tipped ones crack and leak coolant into the connector. The sensors are like 10-12 there pretty cheap. If u follow the upper radiator hose to the head below that screwed into the head u will find the sensor. If the sensor doesn't help with the starting the 1997 saturns are also known for the fuel pump bleeding down causing extended cranking an hard starts.U would need a fuel pressure gauge to check that. Let me know what u find.