What is the reason why the engine makes a dry roar when stepping on the accelerator deeply?

The reasons why the car can't accelerate are carbon deposition, fuel system, air intake system, engine overheating and so on.

1. Carbon deposition

The carbon deposit here includes cylinder carbon deposit, throttle carbon deposit, spark plug carbon deposit, intake carbon deposit and so on. These positions are closely related to the power output of the engine. When there is too much carbon in the engine, the ignition energy of the car will be reduced, and the intake efficiency will also be reduced, which will eventually lead to the decline of engine power, weak acceleration and stuffy sound.

2. Fuel system

Adding inappropriate fuel label (such as 90+93), resulting in the decline of automobile output power and power; Or because the vent hole of the fuel tank cover is blocked, the fuel tank switch, fuel filter and the oil pipe between the fuel tank and carburetor are partially blocked, which can not meet the required oil supply, resulting in too thin mixture and weak engine acceleration.

3. Air intake system

Air and gas are one of the power sources of the engine. If the air filter is not cleaned in time for a long time, it will lead to blockage, insufficient air volume and excessive combustible mixture, which will reduce the engine power. If it is a vehicle with a turbocharger, once the turbocharger fails, even if the throttle is given, the engine will still be slow and will not explode.

4. Engine overheating

Insufficient engine oil, engine coolant, engine radiator failure, etc. Will increase the load of the engine, resulting in poor heat dissipation of the engine. Engine overheating will cause poor lubrication effect, increase mechanical wear, reduce engine power, and lead to engine acceleration weakness.