DeVille DTS V8-4.6L VIN 9 (2002)
Throttle Body: Service and Repair
Throttle Body Service
REMOVAL PROCEDURE
1. Disconnect the MAF sensor electrical connector.
NOTE: Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.
2. Loosen the intake air duct clamps.
3. Remove the mass air flow (MAF) sensor and air cleaner intake duct (2) as an assembly.
4. Inspect the throttle body bore (1) and throttle valve plate for deposits. Open the throttle valve to inspect all surfaces.
NOTE: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
5. Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 Canada P/N 993026, or
AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.
INSTALLATION PROCEDURE
NOTE:
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The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect
airflow readings resulting in MIL illumination or a driveability concern. An improperly installed inlet duct assembly or air cleaner assembly may
cause misalignment.
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Refer to Fastener Notice in Service Precautions.
