Engine will not start in cold weather . Eng.cranks and starts but will not run

What is your question?

My 1998 cavalier will crank , engine starts, then stops in run position. Something or some part on engine has a ambiant tempature problem. Engine starts when it is 60deg or higher. But any lower it will not start. I have changed the ecm, ecu, coils, . It went from diagnosing to changing parts. Also when the instrument gauges and light's start blinking and needles finally stabilize to a solid on mode , then it will start, i also changed the ign switch and pass lock sensor, checked voltage to ign sw. And fuse box, all 12v. Checked wiring for breaks . Pretty sure it started when eng was pulled and installed after rebuild, made sure all sensors were hooked back up right.

What makes this problem better or worse?

When cold weather sets in starts ok in summer or hot weather

How long has your 1998 Chevrolet Cavalier had this problem?

At least a year or more