What to Do When There's Abnormal Noise Upon Releasing the Accelerator?
2 Answers
When abnormal noise occurs upon releasing the accelerator, you should first check whether it is due to a cold start, inappropriate engine oil, or a backfire fault in the engine. Here are the detailed explanations: 1. Abnormal noise during cold start: When starting a cold engine, the oil pump cannot immediately establish oil pressure, causing insufficient lubrication of the valves and resulting in abnormal noise. After the car has been parked for a long time, the engine oil flows back to the oil pan. During a cold start, the oil pump cannot immediately establish oil pressure, especially in the upper part of the engine, leading to insufficient lubrication of the valves. The hydraulic lifters and mechanical rocker arms fail to operate properly, causing abnormal noise. Solution: Reduce the number of times the car is turned off. 2. Abnormal noise caused by inappropriate engine oil: If the engine oil viscosity is too high, it may not provide sufficient lubrication, leading to abnormal noise. Solution: Replace with the required gasoline.
I've encountered a similar issue before - hearing a 'clicking' sound when releasing the accelerator, which was quite annoying. It might be a minor problem with the exhaust system, such as loose exhaust pipe connections or aged rubber mounts. You could try checking and tightening the chassis screws with a wrench yourself. Alternatively, if it's a metallic scraping sound, it could indicate issues with the driveshaft or universal joint, which shouldn't be ignored as prolonged neglect might lead to more serious failures. Safety first - I recommend driving directly to a professional repair shop for a comprehensive inspection. Technicians can use diagnostic equipment to pinpoint the cause. Regular vehicle maintenance during normal driving can help prevent such abnormal noises from occurring.
