My Dongfeng van has just burned engine oil for two years, and the fire plug ring valve and oil seal ignition coil cylinder line nozzle throttle valve have also been washed, and it has started idling,

My Dongfeng van has just burned engine oil for two years, and the fire plug ring valve and oil seal ignition coil cylinder line nozzle throttle valve have also been washed, and it has started idling, occasionally missing a barrel. A, fault judgment:

It is usually found that the engine is working abnormally or lacks power. At high, medium and low speeds, the engine works unevenly, vibrates the muffler rhythmically, emits black smoke and shoots. Engine cylinder shortage will lead to high fuel consumption, black smoke, weakness and reduced horsepower. The vehicle can't afford to speed up, the vibration is serious, and the driving noise is increased. And it is very unfavorable to driving safety. Especially in the road section that needs to be heightened, the engine load of the vehicle without cylinder increases, and the body jitter is more obvious, which is very prone to instantaneous dead fire.

Second, the engine cylinder-free operation will bring great harm:

1. Engine speed and power decrease.

2. Increase fuel consumption and emission pollution.

3. Intensify the wear of moving parts and shorten the service life of lubricating oil.

Third, maintenance methods: first check the circuit fault, and then check the valve tightness (cylinder compression ratio). If there is nothing wrong with the above inspection, it will be troublesome. It belongs to mechanical aging or damage and needs to be overhauled.