The engine is stuffy, accelerating, and can't hum. What is the reason?

The reason for this situation in Pacific Auto Network is that there are carbon deposits in cylinders, throttles, spark plugs and intake pipes. The exhaust gas recirculation system does not work well, and the failure of air flow meter, intake manifold absolute pressure sensor and throttle position sensor will also lead to weak engine acceleration.

There are many reasons why the engine is stuffy and cannot accelerate. The first thing to check is whether the air filter is blocked, and the throttle valve is not properly adjusted and cannot be fully opened. Fuel pressure is too low; Nozzle blockage or poor atomization. Water temperature sensor failure, air flowmeter failure, incorrect ignition or weak high-pressure spark, low compression force of engine cylinder, etc.

The ignition system mainly focuses on the ignition ring and spark plug, which are two vulnerable parts. The performance degradation of spark plugs or the use of inferior spark plugs can also lead to weak acceleration or acceleration jitter of vehicles. In short, there may be many reasons for not accelerating refueling, which need to be ruled out according to the actual situation. (Photo/Text/Photo: Pacific Auto Network Wu Jiahong)