What are the reasons for engine revving without acceleration during normal driving?
4 Answers
Here are the reasons and solutions for engine revving without acceleration during normal driving: 1. Control system or cooling system failure: If there's no issue with the transmission itself, the problem may lie in the control system or cooling system. The vehicle may suddenly experience engine revving during steady driving, but returns to normal when slowing down. This occurs when the transmission abruptly shifts from a high gear to a low gear without timely response. Solution: Reduce speed to allow the vehicle to cool down. 2. Clutch plate failure: Brake clutch pressure leakage causes slipping, which may result from insufficient transmission valve body oil pressure or damaged buffer plates leading to transmission slippage. Solution: Visit a 4S shop or repair shop for fault inspection and repair.
Once when I was driving, I stepped on the accelerator and the RPM surged, but the car didn't move. This is typically a classic sign of clutch slippage. When the clutch disc is worn, it can't effectively transfer power, causing the engine to rev without accelerating the car. Common causes include weakened clutch pressure plate springs or flywheel damage, and it may also be accelerated by prolonged half-clutch operation. Ignoring it can lead to a sharp increase in fuel consumption or even engine overheating. I recommend promptly checking the clutch condition at a repair shop, not delaying the oil change cycle too long, and avoiding frequent half-clutch operation on slopes during daily driving.
Excessive idling when stepping on the accelerator is often caused by transmission issues, particularly in automatic vehicles prone to slipping. Insufficient or deteriorated transmission fluid can affect power delivery, making it crucial to check fluid levels and color; immediate replacement is necessary if the fluid appears black or emits unusual odors. Worn clutch assemblies or torque converter malfunctions may also be responsible. I adhere to a strict maintenance schedule, changing transmission fluid every 40,000 kilometers, and avoid aggressive driving to minimize thermal damage—procrastination can lead to costly repairs.
When the engine idles abnormally while pressing the accelerator during normal driving, it's very dangerous and often caused by clutch or transmission failure. I would immediately slow down and pull over to check for any burning smell or unusual noises. If left unaddressed, it could lead to loss of control and accidents. It's crucial to have a professional mechanic inspect and repair the issue as soon as possible to prevent minor problems from escalating into major ones.
