What Causes Engine Power Loss and Dry Roaring When Accelerating Hard?
2 Answers
The reasons for engine power loss and dry roaring when accelerating hard are: 1. Aged ignition coils or spark plugs not replaced for a long time; 2. Fuel system malfunction causing low pressure; 3. Excessive engine carbon deposits leading to poor fuel atomization, incomplete combustion, excessive exhaust emissions, and weak engine acceleration; 4. Engine system malfunction; 5. Damaged three-way catalytic converter or turbocharger. A vehicle's engine operates through the coordinated work of three systems: the intake system, ignition system, and fuel system. When any component malfunctions, it may result in reduced engine power, unresponsive acceleration, inability to increase RPM, and weak acceleration.
I was also quite puzzled when I first encountered this issue—stepping hard on the gas pedal only to hear the engine roar without gaining speed. Common causes include the following aspects: The clutch or transmission may be slipping, especially in manual transmission vehicles, where worn clutch plates can prevent power from reaching the wheels. If the air filter is severely clogged, the engine is like a person with their mouth and nose covered, unable to inhale enough air. The fuel system is also suspect—low fuel pump pressure or clogged injectors can result in insufficient fuel delivery relative to throttle input. Issues in the ignition system, such as worn spark plugs or faulty ignition coils, can lead to incomplete combustion. A blocked exhaust system, like a clogged catalytic converter, can also hinder performance by preventing exhaust gases from escaping. I recommend first reading the trouble codes to pinpoint the problem. Later, I found that regular maintenance is particularly effective in preventing such issues.
