How to clean the throttle body on a 4 cylinder 2AZ-FE Toyota.\r<br>\r<br>The intake must be removed to access the throttle body at the back of the engine bay. \r<br>\r<br>First, the air box and vacuum lines are removed, exposing the air filter. The air intake tube is then removed by loosening hose clamps around the throttle body. \r<br>\r<br>With the ignition in ON, floor the pedal to open the butterfly valve, since this vehicle is drive by wire. Use a toothbrush and throttle body cleaner to clean the carbon deposits in the throttle body. Clean excess cleaner with a rag and replace all components.\r<br>\r<br>The first start on the car will be hard and may require throttle input to burn the cleaner in the intake. If a check engine light illuminates, disconnect the battery for a few minutes to clear the code.\r<br>\r<br>Procedure was shown on a 2003 Toyota Camry 4 cylinder. Same procedure applies to 4 cylinder Rav4, Scion tC, Highlander, Solara and XRS Corolla and Matrix with the 2.4L engine.\r<br>\r<br>Perform a throttle body or idle air control valve cleaning if your car idles and runs rough, wont start, has reduced throttle response or is getting bad fuel economy. Its also a good time to clean out the MAF (mass airflow sensor), PCV valve and change the air filter if it is dirty.
