The van can't add the throttle. What's wrong with the red exhaust pipe?

The van can't afford to add the accelerator, and the exhaust pipe is red-hot. If it is accompanied by a slight beep, it is the cause of improper ignition of the spark plug.

If the spark plug is not ignited properly, the gasified gasoline will not explode in the cylinder, and it will be directly discharged to the exhaust pipe for combustion, resulting in the exhaust pipe burning red.

At this time, it is not that the car can't afford to add the throttle, but that the added oil does not do work in the cylinder to push the piston.