which make the cleaner more effectively contacted with contaminants existing within the air intake system an auger is also disclosed for cleaning out the inside surfaces of the air intake duct so that contaminants are not allowed to crumble into the air intake system also disclosed is a cleaner which is particularly useful in cleaning diesel engines and may be used with the devices and methods described above application_number US 72230203 A description 0026 fig1 8 are illustrative of the present invention fig1 shows the typical air intake system of a diesel engine where the egr valve has been removed normally egr valve 12 is attached to an air intake duct 14 by bolts 40 which are received through holes in flange 15 air intake duct 14 is typically upstream of the combustion section not pictured of the diesel engine in order that the present invention be implemented egr valve 12 is removed from air intake duct 14 by removing bolts 40 once removed egr valve 12 will be thoroughly cleaned manually separately from the other processes described here in a manner known to those skilled in the art the egr valve is then set aside pending reattachment as will be described later air intake duct 14 the mouth thereof now exposed in the absence of egr valve 12 will usually be visibly dirty especially if the vehicle has been driven for significant mileage the technician will notice substantial build up of hydrocarbons 7 on the cylindrical interior surface of air intake duct 14 proximate the mouth 42 of the air intake duct this build.