Throttle Body Cleaning

REMOVAL PROCEDURE





1. Remove the IAT (Intake Air Temperature) sensor electrical connector (1) from the Intake Air Temperature (IAT) sensor (2).




2. Remove the intake air duct assembly.




3. Remove the snap ring (3) at the air inlet screen (2) on the throttle body (1).

NOTICE: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

4. Inspect the throttle body bore and throttle valve plate for deposits. It is necessary to open the throttle valve to inspect all surfaces.
5. Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or AC-Delco Carburetor Tune-Up Conditioner, PIN X66-P, or equivalent product.



INSTALLATION PROCEDURE
1. Install the snap ring (3) at the air inlet screen (2) in to the throttle body (1).
2. Install the intake air duct assembly.
^ Tighten the tube clamp to 2.0 Nm (18 in. lbs.).
3. Install the IAT sensor electrical connector (1) to the IAT sensor (2).