Police say Pacheco was crossing the street mid-block when a speeding car hit him and just kept going.
His son was able to give police a detailed description of the vehicle.
"It's described as an older sedan, with a very heavily oxidized paint. The paint is black, but the top of the vehicle is so oxidized it appears to have gray paint on it," SDPD Officer Chris Velovich said.
Police say it's also missing the driver's side window and two men were inside the car.
If you have any information, you are urged to contact San Diego police.