The Jeep Liberty has a fuel-injected engine that incorporates a throttle body for mixing airflow and gas. A throttle body works in the same way as a carburetor on older model vehicles. The throttle body obtains air from the air filter through the air duct hose to mix with gasoline so the spark plugs can ignite it, thus producing power. Your throttle body might need cleaning if the Jeep runs rough at an idle, is slow on takeoff or stalls after the engine is warm.
Park the Jeep on a solid surface outdoors and lift the hood. Wait for the vehicle to cool completely.
Put on safety glasses and rubber gloves to protect yourself from cleaner solution and fumes.
Use a flat-head screwdriver to turn the screw counterclockwise to loosen the hose clamp holding the air tube to the throttle body. Pull the hose off the throttle body, but do not remove the gasket between the hose and the throttle body.
Place the small application tube on the throttle body cleaner. Spray the cleaner into the throttle body opening to soak it. The throttle body is round, with a flat plate in the middle, similar in appearance to a carburetor.
Clean off the throttle body and plate with a small brush to remove any deposits or varnish. Repeat spraying and brushing until the interior is thoroughly clean and appears a bright bare metal.
Apply one drop of light machine oil to a cotton swab. Dab the oil on each side of the throttle body plate where it rotates and touches inside the round throttle body. The metal plate attaches on each side in the center of the throttle body.
Wipe any residue from the throttle body cleaner off all components with a shop cloth.
Slide the air duct hose onto the throttle body. Tighten the hose clamp with the flat-head screwdriver.
