Caterpillar M3 17D2 engine idling normally. What's wrong with the throttle not being added?

1, many people think that the throttle carbon deposit will affect the acceleration performance of the engine. However, I think that the carbon deposition in the throttle only affects the idling instability, and has little effect on the acceleration performance of the engine. Blockage of air filter element or water intake will reduce the air volume, resulting in excessive air mixture, incomplete engine combustion and poor acceleration. At this time, the exhaust pipe emits black smoke seriously.

2. There is something wrong with the air flow meter, which leads to the decrease of air intake and the mixture being too rich or too thin, which affects the acceleration performance. The spark plug of individual cylinders is damaged, that is, the cylinder is missing, which affects the acceleration performance. Also, the cylinder pipeline leaks and so on.

3. After the engine valve, cylinder liner, piston and piston ring are worn, the cylinder pressure cannot meet the requirements. The intake valve clearance is too large and the exhaust valve clearance is too small. Or the intake and exhaust valves are cracked, which will lead to cylinder shortage and affect the acceleration performance.