1999 Saturn SL2 Engine starting problem

I suspect u might have a bad coolant temp sensor causing the engine to run way too rich. It's screwed into the head below where the upper hose goes on it has two wires a yellow one and a black one. Look at the connector see if it is corroded if it is u will have to clean or replace it. Also look at the tip of the sensor that goes into the head if it's cracked it needs to be replaced. It could even be bad if it's not cracked but they crack alot of the time though. If u replace it make sure u get a brass tipped one the plastic tip ones crack. Make sure the engine is cold u will loose coolant. There under 20 and cause all kinds of symptoms. Also do u have any codes?Let me know what u find.