a throttle body takes the place of a carburetor in a fuel-injected system for air management. failure to perform this service can cause vehicle to stall and will also effect fuel mileage. what does the service consist of throttle body removal from the vehicle. ais motor is removed and the throttle body throat is cleaned of carbon and washed with solvent. ais motor reinstalled and throttle body is reinstalled with new gasket. inspect air filter (replacement extra).