The Dodge Omni was parked about six car lengths from a railroad overpass in Newark that serves Amtrak and NJ Transit trains. The trains are running.
Someone passing by noticed the cans in the back of the car and thought they were on a box and connected to wires, so they called police.
After investigating, authorities said the cans were actually on top of a tool box and the wires were not connected to the can.
Authorities have identified the owner of the auto, a 58-year-old man from Point Pleasant, New Jersey, through motor vehicle records and are attempting to contact that person.
Police said it appeared to be a false alarm, but they were still investigating.
Last month, Faisal Shahzad pleaded guilty to a failed bombing attempt using a sport utility vehicle rigged with a homemade bomb in New York City's Times Square on May 1.
Authorities arrested Shahzad, a 30-year-old from Bridgeport, Conn., as he tried to leave the country on a Dubai-bound flight. He said he had trained with Pakistani Taliban leaders and had planned a revenge attack in the U.S.