Once you remove the throttle body, replace the old gasket and reinstall, ensuring the proper torque specifications. For the idle air volume relearn procedure, meet specific conditions like battery voltage and engine temperature. Start the engine, warm it up, turn it off and wait 10 seconds before servicing it. Turn the ignition on, wait three seconds, then depress and release the accelerator pedal five times within five seconds. Start the engine, let it idle for 20 seconds, then check the idle speed and ignition timing.