What to Do If the Idle Speed Is High After Cleaning the Throttle Body?
2 Answers
If the idle speed is high after cleaning the throttle body, you can seek professional help to adjust the idle speed data using a diagnostic tool, or wait for the car's computer to self-adjust. After cleaning the throttle body, the accumulated impurities that were attached to it are removed, causing the original air intake volume to no longer match the current intake speed, leading to a higher idle speed. The time it takes for the car's computer to self-adjust varies. The throttle body determines the car's air intake volume and affects its acceleration. Properly cleaning the throttle body can help save fuel. During daily driving, if you notice unstable idle speed or insufficient power, consider cleaning the throttle body. Generally, the recommended cleaning interval is every 20,000 to 40,000 kilometers, but the exact timing depends on the driver's habits and usage.
I once experienced higher idle speed after cleaning the throttle body, mainly because the ECU's memory was reset during the cleaning process, requiring the system to relearn the idle state. My approach was to let the car idle in place for a few minutes, then drive about ten kilometers, after which the RPM would usually gradually return to normal levels. If it remains high, check if the throttle body is loosely installed or if the sensors are dirty, and ensure all connectors are securely plugged in. After cleaning, it's best to perform an idle relearn procedure, such as turning off the AC and headlights before starting the engine, letting it run for five minutes, and then turning it off. Don't rush to spend money on repairs; try these simple steps first. The adaptation process usually takes a few days. When cleaning, use mild cleaners to avoid damaging components and causing abnormalities. Be patient; high idle speed won't cause immediate problems, but leaving it unadjusted for a long time will increase fuel consumption.
