Missing idle cylinder after classic Focus hot car?

There are many reasons for the lack of cylinder in hot car, and there are also many failures caused by lax sealing of ignition coil or valve.

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 no problem with the above inspection, it will be more troublesome, which belongs to mechanical aging or damage and needs overhaul. I hope my answer can help you.