If your idle is rough, erratic, or stalling, the issue is *probably not* the IAC valve itself (though it could be). It's more likely one of the following:
* Dirty or faulty IAC valve: While you can't "reset" it, you *can* clean it. This involves removing it, carefully cleaning it with throttle body cleaner (following the cleaner's instructions), and reinstalling it. Make sure the throttle body is also clean. A severely damaged IAC valve needs replacement.
* Vacuum leaks: Leaks in the intake manifold or vacuum lines will severely affect idle. Inspect all vacuum lines for cracks or disconnections.
* Dirty throttle body: A dirty throttle body can cause erratic idle. Clean it thoroughly with throttle body cleaner.
* Faulty TPS (Throttle Position Sensor): A malfunctioning TPS can provide inaccurate information to the PCM, leading to idle problems.
* MAF (Mass Air Flow) Sensor: A dirty or faulty MAF sensor will also disrupt the air/fuel mixture and cause idle issues.
* PCM issues: Though less likely, a problem with the PCM itself could be the culprit.
Steps to troubleshoot, instead of resetting:
1. Clean the Throttle Body and IAC Valve: This is the first and easiest step. Use a quality throttle body cleaner and follow the instructions carefully. Be gentle when cleaning the IAC valve to avoid damaging the delicate pintle.
2. Inspect vacuum lines: Carefully examine all vacuum lines for cracks, leaks, or disconnections. Replace any damaged lines.
3. Check the TPS voltage: You'll need a multimeter to check the voltage output of the TPS. Consult your repair manual for the correct specifications and how to perform this test.
4. Check the MAF sensor: Again, a repair manual will provide information on testing the MAF sensor. Often, simply cleaning the sensor with MAF sensor cleaner can resolve issues.
5. Consider professional help: If you're uncomfortable with these steps, or if the problem persists after trying them, take your Camaro to a qualified mechanic for diagnosis and repair.
In short, there's no IAC reset button. Address the underlying problem instead of searching for a nonexistent reset. A repair manual specific to your 1994 Camaro 3.4L will be invaluable in this troubleshooting process.
