What Causes the Loud Engine Roaring Sound When Accelerating in the Outlander?

[RoseLee]

The reasons for the loud engine roaring sound during acceleration include: exhaust pipe leakage, dirty or clogged throttle, and engine misfiring. The specific causes are as follows: 1. Exhaust pipe leakage: When there is a leak in the intake or exhaust pipe, the vehicle's exhaust rate increases during acceleration, resulting in a loud roaring sound. 2. Dirty or clogged throttle: During acceleration, the engine's load increases, requiring the throttle to open wider and more fuel to be injected. If the throttle does not open to the optimal position due to dirt or clogging, it can cause poor air-fuel mixture ratio, leading to noise during acceleration. 3. Engine misfiring: Engine misfiring mainly refers to one or more cylinders not functioning properly, typically manifested as insufficient vehicle power, severe shaking of the exhaust pipe, and a clear "popping" or thumping sound from the engine.

[DiJoseph]

When driving my Outlander, I encountered loud engine roaring during acceleration, which was quite annoying. Possible reasons include a clogged or aged air filter, leading to insufficient air intake and causing the engine to struggle for air, resulting in noise; excessive engine carbon buildup is another common factor, as prolonged low-speed urban driving leads to incomplete combustion, increasing vibration and noise during acceleration; leaks in the exhaust system or damaged mufflers can amplify the roaring; delayed transmission shifting may also trigger high engine RPMs. It's recommended to first check if the air filter is dirty and replace it promptly—regular maintenance every 5,000 km can prevent this. If the noise is accompanied by a drop in power, visit a professional shop immediately to inspect the chassis and exhaust components, and don’t wait until fuel consumption skyrockets to regret it.

[Harley]

As an Outlander owner, the roaring noise during acceleration is quite annoying. I believe it's mainly due to long-term carbon buildup. I mostly drive in the city and rarely take high-speed runs, leading to unclean combustion chambers that cause rough acceleration and amplified noise. Muffler issues could also be a factor - aging or perforations can directly transmit sound. If the air filter is clogged, the engine struggles to intake air, naturally making more noise. Once during self-inspection, I found the filter full of dust - replacing it made things quieter. Driving habits matter too - slamming the accelerator worsens the sound, so try smoother acceleration. Remember to do regular carbon cleaning treatments; don't skimp on maintenance costs, or prolonged noise issues might damage core engine components.

[Daisy]

Acceleration roaring noises are commonly caused by faults in the intake or exhaust systems. In my experience, clogged air filters are the primary culprit, as reduced air intake forces the engine to work harder; excessive carbon deposits can also disrupt the combustion process, generating additional noise. Exhaust leaks, such as loose pipe connections, increase vibrations and noise during acceleration. Regular maintenance of air filters and carbon cleaning is essential. Avoid frequently using the air conditioner in recirculation mode in dusty environments. If the noise persists, it may indicate more serious issues like transmission problems, so early inspection can prevent larger expenses.