"What all firefighters and all municipal employees have to remember is they represent the city - particularly our Bravest, who paid a terrible price, losing 343 of their fellow brothers at 9/11," Bloomberg declared.
"The truth of the matter is, you're never off duty," the mayor added. "You always represent those you work with."
In the latest incident to give the FDNY a black eye, off-duty firefighter Frank Cecero, 28, was drunk early Saturday when - pretending to be a cop - he ordered a car to pull over on a Staten Island highway, then punched one of the occupants in the face, authorities said.
On Friday, probationary firefighter Alfred Delosrios, 33, was allegedly driving drunk when his Jeep crashed into a speeding BMW driven by Roland Tetruashvili, 18, killing the Brooklyn teen.
Both Cecero and Delosrios, an ex-cop, were suspended without pay for 30 days yesterday by the FDNY.
Once they return to work, both could be placed on modified duty pending the outcome of criminal charges filed against them, and they could also face departmental charges, sources said.
An angry Bloomberg suggested that firefighters who break the rules should get the ax.
"The rules are reasonably clear about how much the city can penalize somebody or whether they have to continue the employment of somebody - with their conduct off-duty being the factor," he said.
"It reflects on everybody that works in the Fire Department when some people in the Fire Department conduct themselves inappropriately off-duty," he added.
Cops said Cecero, who was charged with DWI, criminal impersonation and assault, became enraged when he couldn't pass a car driven by the girlfriend of Ostrap Charak, 21, of Brooklyn.
He flashed his firefighter's badge's and ordered the car to pull over, then asked the occupants for ID. After Charak protested that Cecero had no right to pull them over with only a firefighters' badge, Cecero punched him in the face, cops said.
Delosrios initially was charged with manslaughter in addition to DWI, but the manslaughter was dropped on the ground Tetruashvili contributed to his death by speeding.
"Suspension is a joke. Firing is what's in order," said Howard Greenberg, the lawyer for the teen's family. "If it was you or I who killed a police officer or firefighter while driving drunk, we would be charged with criminal homicide."
Additional reporting by Andy Geller
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