Maintenance and repair of used cars Dongfeng Nissan Yida in 2008, 1.6L, original car with automatic transmission, I started in July, 20 12, 8.2wkm.

Your question: There are several possibilities, 1, and the starting oil and circuit of the engine need to be checked. Starting oil and circuit include electronic spark plug, throttle valve, fuel rail pressure, etc. 2. Check the working performance of the engine. Metaphor cylinder pressure, air intake and cylinder cleaning, as well as the technical performance of working spark plugs. In short, there is not much problem under the condition of good cylinder pressure performance. This is a routine failure, so we just need to go to the 4S shop for maintenance. The maintenance you do above is line inspection. This has nothing to do with fault. I hope it helps you.