Wuling Glory 1.5 Engine jitter without fault light at idle speed.

When Wuling Glory 1.5 is idling, there is no engine jitter. If the lamp is checked and there is no accessory fault, then the problem is a soft fault. This kind of fault is actually the fault of exhaust emission sensor caused by oil circuit problem. There are several possibilities. The oil path is too dirty and there is too much gum, which is brought into the combustion chamber and leads to poor combustion. Because the EFI engine can cover up some problems, there is no serious jitter. As long as it is confirmed that there is no fault with the accessories, 2.5 This car will have a box of oil and a general fuel cleaner twice, and this fault light will disappear twice in a row. That is, it disappeared after adding two boxes of oil. It may also be that the large carbon deposit leads to the increase of compression ratio and the mixture is not up to standard. After all, there is a high probability that the oil circuit is responsible for cleaning the lower oil circuit. I did this in 2.5 before, and I couldn't find the problem with the same fault code.