Berryman Air-Intake & Throttle Body Cleaner (part #2209) will clean deposits from the butterfly valve and inner surfaces of the throttle body for easier starting and smoother idle. It can be used with the vehicle running, but we recommend performing the maintenance with the engine off. Simply remove the air boot from the front of the throttle body, spray a clean, soft towel, and wipe all inner surfaces clean. Be careful not to get overspray on painted or otherwise sensitive surfaces.