Cops dont have to have consent, all they gota say is they smell it, your word against 2 cops, and the fact they DID find stuff just makes your case harder to proove. And besides dude, if you would have said No to consent, they would have just kept you there till they got a Dog/Warrant. Either way your chit out of luck. Enjoy probation. And the above case, no1 is being pulled over with with 3 lbs of weed and shrooms to boot, and getting off, because he was transporting it across state lines more than likely, which makes it a Felony and a crime has already been committed, So cops have total authority to search your car.