Does dirty throttle affect engine jitter?

It may be that the accelerator is dirty and the fuel injector is carbon-deposited. The vehicle has traveled 74,000 kilometers, so it is recommended to clean it.

Other fault points that cause engine jitter are:

Poor gasoline quality leads to poor atomization effect of fuel injector, and insufficient combustion of mixed gas in cylinder will also lead to idling jitter. It is recommended to use high-grade gasoline after using this box of gasoline and do a fuel system cleaning.

The spark plug is damaged and the spark plug gap is worn, which leads to insufficient ignition and insufficient combustion of mixed gas, which leads to accelerated jitter. The ceramic part of the spark plug has cracks, which leads to the ignition failure of the spark plug and the failure of one cylinder, which also leads to accelerated jitter.