Archer could not even make any calls to his team. He was not allowed to use his undercover phone to contact the FBI. He never knew who might check up on him or who might be listening in. But he wanted to tell his team to find that driver. Then a realization hit Archer, he had no idea what that driver looked like. He saw so many drivers in the evening running out of the Hell's Kitchen distribution centre.
He had no idea which driver left the truck and ran. What will he tell his team? How will they find him? They can't ask NYPD for help or offer their help. They will have to tell them from where they obtained their information and without outing Archer, no one would believe them. All will think that they work for the Hall family and are trying to trick them by helping them.