LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2004 >> XG350 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> MFI Control System >> Throttle Position (TP) Sensor >> Throttle Body Cleaning
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Body Cleaning

NOTE: Disconnect the intake air hose from the throttle body, and check the throttle valve surface for dirt. Spray cleaning solvent on the face of the valve to remove dirt.
  1. Warm up the engine, then stop it.
  2. Remove the intake air hose from the throttle body.
  3. Plug the bypass passage inlet of the throttle body.
    NOTE: Make sure the solvent does not enter the by-pass passage.
  4. Spray cleaning solvent into the valve through the throttle body intake port and let it soak for about 5 minutes. After 5 minutes open the valve and wipe it clean with a soft rag.
    CAUTION: Keep the throttle valve closed while spraying to avoid charging the intake path with solvent.
  5. Start the engine, race it several times and allow the engine to run near idle for 1 minute.
  6. Repeat Steps 4 and 5.
  7. Unplug the bypass passage inlet.
  8. Attach the intake air hose.
  9. Disconnect the battery ground cable for more than 10 seconds.
    Fig 1: Disconnecting Negative Battery Cable
    G00721334Courtesy of HYUNDAI MOTOR CO.
scientia non olet · About LEMON Manuals