Dmax2.5 is powerless

Hello, I want to ask why Dmax2.5 is invalid. Dmax2.5 is invalid because:

1. The fuel entering the combustion chamber is insufficient, which may be caused by the blockage of the fuel injector, oil leakage from the oil pipe, power reduction of the oil pump or blockage of the gasoline filter.

2, poor fuel quality, leading to impurities will block the oil circuit, resulting in poor oil supply, engine performance will be reduced.

3. Too much carbon deposition in the throttle and intake pipe will affect the engine's insufficient air intake, fuel can't be fully burned in the engine, and the automobile power can't keep up.

4. The ignition coil is damaged, which affects that the engine cylinder can't ignite, the engine can't work normally, and the engine will tremble and vibrate.