It happened on the 900 block of South 52nd Street in Southwest Philadelphia just before 3:30 p.m. Tuesday.
The victim told police that a white Buick sedan was following his car very closely.
When he pulled over to let the vehicle pass, he told police the driver of the passing Buick fired a gun at him.
No one was hit by the gunfire.
Police are still searching for the suspect who fled southbound on 52nd Street and westbound on Florence Street.
Anyone with any information is asked to call police at 215-686-TIPS.