How to Clean a Car GPF?
2 Answers
Here are the methods to clean a GPF: 1. Idle in place: Engage the handbrake and shift the gear to N. Then press the accelerator to maintain the RPM between 2000-2500 for 5-10 minutes, after which the GPF indicator light will automatically turn off. 2. High RPM driving: While driving, slightly increase the RPM to raise the exhaust pipe temperature. The high temperature can burn off the particles trapped in the GPF. Here are methods to prevent GPF clogging: 1. Avoid refueling at small gas stations: The fuel quality at small gas stations is often questionable. Using fuel with more impurities will increase exhaust particles, making the GPF more prone to clogging. 2. Use low-ash engine oil: Low-ash engine oil is specifically designed for China VI vehicles. Not using it can easily lead to DPF clogging. 3. Avoid prolonged idling: During prolonged idling, the exhaust cannot burn completely, increasing exhaust particles and leading to GPF clogging.
Cleaning the car's GPF is actually quite simple. My approach is to first check if the warning light on the dashboard is on. If it is, it means it's clogged. I'll drive on the highway for about 30 to 40 minutes, maintaining a speed above 80 km/h and keeping the RPM a bit higher, allowing it to automatically clean the particulate matter through high-temperature combustion. This is called passive regeneration. In daily driving, it's important to avoid always taking short trips, like short commutes, which can easily cause clogging. If driving doesn't successfully clean it, I'll remove the GPF unit, rinse it with water or soak it in a specialized cleaner, wash off the carbon deposits, and then reinstall it. However, this step requires help or careful handling to avoid damaging the parts. I often do it myself to save money, and it takes about one or two hours to finish. Prevention is more important—using high-quality gasoline reduces impurity buildup.
