Hi where is Idle Air Control Valve in 1995 Chevy G20 5.7L and it possible to clean it?

The Idle Air Control (IAC) valve on a 1995 Chevy G20 with a 5.7L engine is typically located on the throttle body. It's a small, usually cylindrical, electrical component that's mounted directly to the throttle body itself. It's fairly easy to spot once you locate the throttle body. The throttle body is the large housing connected to the intake manifold; the butterfly valve inside controls the amount of air entering the engine.

To find it:

1. Locate the throttle body: It's usually near the front of the engine, on the intake manifold. You'll likely see a large air intake tube leading to it.

2. Look for a small electrical connector: The IAC valve will have a single electrical connector plugged into it.

3. Check for a screw-on or clip-on design: Some IAC valves are held on by screws, others might clip on.

Can you clean it? Yes, it's possible and often recommended before replacement. A dirty IAC valve can cause rough idling, stalling, or poor engine performance. However, success depends on how much buildup is present. Severe internal damage might render cleaning ineffective.

Cleaning the IAC Valve:

WARNING: Disconnect the negative battery terminal before starting any work on the electrical system.

1. Disconnect the electrical connector: Carefully unplug the electrical connector from the IAC valve.

2. Remove the IAC valve: Unscrew or unclip it from the throttle body.

3. Clean the valve: Use a non-chlorinated brake cleaner or carb cleaner (spray sparingly). Avoid getting cleaner into the throttle body itself. Allow the cleaner to dissolve the build-up and then use a small brush (like a toothbrush) to gently scrub away any remaining debris. Pay attention to the pintle (the small rod that moves inside the valve). Blow it out with compressed air.

4. Reinstall the IAC valve: Ensure it's properly seated.

5. Reconnect the electrical connector: Plug it back in securely.

6. Reconnect the battery terminal.

7. Start the engine and check for improvements.

Important Considerations:

* Pictures: If you're unsure, searching online for "1995 Chevy G20 5.7L IAC valve location" with images will be very helpful. You can compare what you see on your engine to the pictures.

* Professional Help: If you're uncomfortable working on your engine, it's best to take it to a mechanic. Improper cleaning or reinstallation could damage the valve or other components.

* Replacement: If cleaning doesn't resolve the problem, the IAC valve may need replacing. Always use a quality replacement part.

Remember safety first. Work in a well-ventilated area when using cleaning solvents. Always refer to a repair manual specific to your vehicle for detailed instructions and diagrams.