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Q:

ck eng light comes on after truck surges, at stop lights. on 1993 Ford Ranger

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Not all the time
(1) Answer
Need more info. From what you posted I would suggest removing and cleaning the Master airflow sensor located about 6 inches from air filter. Need safety starheads to remove it. Otherwise, it could a fouled catalytic converter. But, need more info and get check engine code read if possible. Use master airflow cleaner only on the sensor.