What happened when the Dongfeng Peugeot 508 cold car started to stall?

The main reason of cold start jitter is incomplete combustion. Incomplete combustion will lead to insufficient power and jitter.

Reasons for idling jitter:

1, engine carbon deposit is serious. The most common reason is too much carbon deposit in throttle or injector. When there is too much carbon deposit in the engine, the gasoline sprayed by the injector will be absorbed by the carbon deposit during cold start, which leads to too thin mixture and difficult starting. Only when the gasoline adsorbed by carbon deposits reaches saturation can it be easily started.

2. Poor ignition system and excessive carbon deposition in spark plugs can also lead to idling jitter. Check whether the ignition system is faulty and whether the spark plug has too much carbon deposit.

3. The oil pressure is unstable. If the engine carbon deposit has been cleaned, the throttle has been cleaned or the spark plug has been replaced, the idle jitter problem still exists. It is recommended to go to 4S shop to check whether the oil supply pressure and intake pressure sensors are normal.

Solution:

The best way is to clean the oil circuit regularly. Due to the change of fuel and the improvement of emission standards, engine manufacturers cannot solve the jitter problem in a short time. In addition, the poor fuel quality or long storage time of new cars will lead to the increase of colloidal components in the oil circuit, pollute fresh fuel and lead to excessive carbon deposition. It is especially common for national six vehicles. Only by maintaining and cleaning the oil circuit regularly can most problems be gradually alleviated. Using fuel additives, such as PNF stock solution, can solve the problems caused by carbon deposition.