What Causes the Abnormal Noise During Acceleration Between 1500 to 2000 RPM?
2 Answers
1500 to 2000 RPM acceleration abnormal noise reasons are as follows: 1. Unfiltered air: The engine needs to intake a large amount of air during operation. If the air is not filtered, the suspended dust in the air will be sucked into the cylinder, accelerating the wear of the piston group and the cylinder. Larger particles entering between the piston and the cylinder can cause severe "cylinder scoring" phenomenon. The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air, ensuring sufficient and clean air enters the cylinder. 2. Clutch issue: The compressed air flow noise generated by the turbocharger during operation, the deeper the throttle pedal is pressed or when the engine is revving, the louder the engine noise becomes. Press the throttle gently, do not press it all the way down, as pressing it suddenly all the way down will produce this abnormal noise.
I've encountered the strange noise during acceleration between 1500 to 2000 RPM several times, which could stem from several common situations. The most frequent cause is loose or aged engine belts, as they tend to resonate and slip at that RPM range, producing squeaking sounds. Worn pulley bearings can also lead to similar noises, especially when the load increases during acceleration. Another possibility is an exhaust system leak, where changing airflow creates a whistling sound at the damaged spot. Sometimes, issues with the A/C compressor belt or water pump can also contribute. When I inspected it myself, I had someone help press the accelerator while I listened for the source of the noise, such as the front of the engine or underneath the chassis. Ignoring it long-term may increase the risk of belt failure, which could be dangerous if the engine stalls while driving. For safety, regular maintenance of belt tension can help prevent such issues. Unaddressed acceleration noises might also affect fuel efficiency, so getting it checked early by a professional shop is the right approach.
