What causes the abnormal noise when stepping on the accelerator in a Sylphy?

1 Answers
MacSamantha
07/29/25 7:34pm
The reasons for abnormal noise when stepping on the accelerator in a Sylphy may be: This phenomenon is likely caused by the sound from the valves, or it could be due to insufficient engine oil leading to lack of lubrication in the valves. During cold starts, the engine noise is generally slightly louder than when the engine is warm. The reasons for abnormal noise when stepping on the brake in an automatic transmission vehicle are as follows: 1. Normal activation of ABS: The working process of ABS is actually a cycle of locking and releasing, keeping the vehicle in a state of critical lock rolling. When you step on the brake hard and trigger the ABS, it will produce a clunking sound, which is normal. In this case, simply press the brake pedal firmly to the bottom. 2. The gear makes a "clunk" sound when stepping on the brake in an automatic transmission vehicle: If you hear a "clunk" sound between the transmission and the gear lever when stepping on the brake pedal, the main reason for this noise may be the electronic linkage between the brake system and the automatic transmission. When you step on the brake, the transmission solenoid valve opens and produces a "clunk" sound. At this time, you need to press the gear lock button to shift gears, which serves as a safety reminder.
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