Just purchased a 2000 LC100 that has led a rough life with its previous owners. Temp gauge in the dash wasn't working, so I removed the air intake/resonator between the air filter box and the throttle body to get at the temp sender, and when I pulled the air intake/resonator, about two tablespoons (30 mL) of oil poured out of one of the vacuum ports. I am trying for the life of me to figure out how oil got into the resonator. Is this normal? If not, any idea on what is causing this and what it portends? TIA.