Help: The old Elantra in 2008, the engine was torn abnormally, the idling jitter was serious, and the engine stalled several times, seeking a solution.

I bought it on New Year's Day in 2009. It's almost 8W, and it runs well except for some failures caused by mechanical wear. Because you drive less, you may have less chance to drive at a high speed above 4000 rpm. I suggest cleaning the throttle and nozzle, so that the acceleration will be better and the jitter will be much better. If the ignition of the cold car is not good, it is recommended not to use the spark plug, but to clean the nozzle. After washing, the ignition should be smooth. After all, this car is a very mature technology in Korea. The synchronous belt has been used for four years, so it's time to change it. After all, with the passage of time, the belt is rubber and will age. I spent some money for the comfort+peace of mind oil grid. There is no need to change. I changed more than 70 thousand myself, and it's still clean. They are all made in China, and I added Sinopec. It's not a loss to spend some money on it. It is good to change the machine to a better oil at ordinary times, instead of the so-called special purpose of modern yellow barrels. Yellow shell and Mott are both good, supporting the domestic Great Wall Jinjixing. No matter how good it is, it costs a little.