1997 Chrysler Cirrus will not start in very cold weather

My daughters 1997 Cirrus will not start in very cold weather. If the temp. Outside is 25 degrees or higher it starts fine. But if colder, it tries to start but just will not quite fire up. The garage said it need a tune up, so I did that, then they said it was 2 plugged injectors that need to be replaced, I did that. Same problem. Now they say to replace the distributor? I have spent more tahtn this car is worth. Why would a distrigutor be cold weather sensitive? If I put the car in a warm garage, it starts right away. And there is always spark, even in the cold, it just will not quite start up. Also, after cranknig, the plugs a wet with gas.