2003 Buick Century
has a problem with cool starts, will not idle, engine just stops running. Once it is warmed up it seems to run fine. has shut down a few times even after warming engine.
change the coolant temp sensor , pretty cheap ,, see if you can get some carb cleaner down the throttle while it's running perhaps a new iac valve and clean that port or lastly the tps , these things should be tested first so you don't spend money needlessly