Cleaning Coked Throttle Bodies

CLEANING THROTTLE BODIES

Coked throttle bodies will cause low idle speed and poor idle quality. When replacing one throttle body, always remove and clean the other throttle body. After installing the throttle bodies, set synchronization. Also, if the vehicle has low idle and the idle air control motor operates normally, clean both throttle bodies and synchronize them before checking throttle body minimum air flow. Refer to the General Diagnosis for the Throttle Body Minimum Air Flow procedure.

1. Remove the throttle bodies from engine.

WARNING: CLEAN THROTTLE BODY IN A WELL VENTILATED AREA. WEAR RUBBER OR BUTYL GLOVES, DO NOT LET MOPAR PARTS CLEANER COME IN CONTACT WITH EYES OR SKIN. AVOID INGESTING THE CLEANER. WASH THOROUGHLY AFTER USING CLEANER.

2. While holding the throttle open, spray the entire throttle body bore and the manifold side of the throttle plate with Mopar Parts Cleaner. Only use Mopar Parts Cleaner to clean the throttle body.
3. Using a soft scuff pad, clean the top and bottom of throttle body bore and the edges and manifold side of the throttle blade. The edges of the throttle blade and portions of the throttle bore that are closest to the throttle blade when it is closed, must be free of deposits.
4. Use compressed air to dry the throttle bodies.
5. Inspect throttle bodies for foreign material.
6. Install throttle bodies on manifold.
7. Adjust throttle body synchronization. Refer to Throttle Body Synchronization.
Throttle Body Synchronization Service