There are many reasons for poor vehicle power, such as excessive carbon deposition in oil circuit, failure of air flowmeter, failure of oxygen sensor, failure of spark plug and ignition coil lamp, etc. It is recommended that the computer read the fault code and make further determination.
A 2008 Dongfeng Hercules model DFL3240AX 13, with a mileage of more than 2 10000 km, is equipped with DC 1340 and 30 engines, and there are abnormal phenomena such as insufficient engine power, black smoke during acceleration and high fuel consumption, but no fault information is displayed on the instrument.