What causes a high rev on cold start up on 93 eagle summit 1.5?

A high rev on cold startup in a 1993 Eagle Summit 1.5 could be caused by a few factors, including a malfunctioning idle air control valve (IAC) that fails to regulate the airflow properly, or a vacuum leak causing an increase in air intake. Additionally, the engine's cold start enrichment system may be providing too much fuel, leading to higher RPMs until the engine warms up. It's also worth checking the throttle position sensor and ensuring that the throttle is fully closed when the engine is off.