Poor Idle when Engine Hot on 1990 Chevrolet Corvette

After driving for 30 min. approx., engine
wants to die at stoplight. Then after
parking for 10 min. Doesn't want to start
with out pumping pedal. Poor or no idle.

Asked by for the 1990 Chevrolet Corvette
You could have a problem with a dirty throttle body or a faulty idle speed control motor.