well if your car doesnt smell like weed and there are no hints of it. i.e. a roach or blunt wraps in plain sight, then they cannot search your car without a warrant but that doesnt mean they wont try. Cops are dicks so they might TRY to search your car cuz of your previous record but they CANNOT. They need probably cause to search or else they need a warrant. Police are trained to intimidate and ask hard questions but you do not have to consent to a search!