- Remove the air cleaner outlet duct. Refer to
Air Cleaner Outlet Resonator Replacement
.
- Inspect the throttle body bore and the throttle valve plate for deposits. You must open the throttle valve in order to inspect all of the surfaces.
Notice: Do not subject a throttle body assembly which contains the following components
to an immersion cleaner or a strong solvent:
• | Throttle position (TP) sensor |
• | Idle air control (IAC) valve |
• | Sealed throttle shaft bearings |
The cleaners will damage the electric components or sensors.
The cleaners will damage some of these components that contain seals or O-rings.
Solvents can wash away or break down the grease used on non-serviceable throttle
shaft bearings.
Never use a wire brush or scraper to clean the throttle body. A wire brush
or sharp tools may damage the throttle body components.
Do not use a cleaner that contains methyl ethyl ketone. This extremely strong
solvent may damage components and is not necessary for this type of cleaning.
- Clean the throttle body bore and the throttle valve plate using a clean shop towel with Top Engine Cleaner, GM P/N 12346535, (Canadian P/N 992872) or Saturn P/N 21007129 or an equivalent product.
- If the deposits are excessive, remove and disassemble the throttle body for cleaning. Refer to
Throttle Body Assembly Replacement
.
- After disassembly, clean the throttle body using a parts cleaning brush. DO NOT immerse the throttle body in any cleaning solvent.
- If you removed and disassembled the throttle body for cleaning, assemble and install the throttle body. Refer to
Throttle Body Assembly Replacement
.
- Install the air cleaner outlet duct. Refer to
Air Cleaner Outlet Resonator Replacement
.