Why does the Mistra have high RPM but can't pick up speed?

[DelJocelyn]

The transmission is selected in a low gear, while the high vehicle speed is driven by the high engine RPM. The detailed explanation for the Mistra's high RPM but inability to pick up speed is as follows: 1. The transmission is selected in a low gear: While the high vehicle speed is driven by the high engine RPM. This situation is only applicable when the vehicle is climbing a steep slope with a heavy load, as it can provide high torque to give the vehicle sufficient traction. However, if this is used on flat roads or when the vehicle is unloaded, it will not only increase fuel consumption but also cause unnecessary wear and tear on the engine and vehicle, which is not recommended. 2. Clutch slipping: The clutch is installed between the engine flywheel and the transmission input shaft. When the clutch pedal is fully released, the power generated by the engine is transmitted to the transmission almost 100% through the clutch. If the clutch slips, it will result in slow acceleration when stepping on the gas. 3. Instrument malfunction: For example, if the engine tachometer shows a falsely high RPM, or the speedometer displays a speed lower than the actual vehicle speed, it can also create a false impression. Diagnosis and repair should be carried out based on the specific situation.

[DelBrooklyn]

I've experienced a situation where the RPM was high but the speed wouldn't increase. The main reason could be clutch or transmission slippage, simply put, the engine is running but the power isn't reaching the wheels. Worn clutch plates are common in manual transmission cars, while automatic transmissions might have issues with the torque converter. Sometimes, tire slippage or stuck brakes can also cause this, but with brake issues, the RPM usually doesn't get this high. If you notice the engine getting louder while the car moves sluggishly, find a safe place to pull over and check immediately. Continuing to drive not only wastes fuel but could also lead to more serious damage, like burning out internal transmission components. I suggest trying a simple test: for manual transmissions, if the car doesn't jerk forward when releasing the clutch in low gear, it indicates slippage; for automatics, observe whether gear shifts are smooth. Avoid high-RPM starts unnecessarily, and regularly check and maintain transmission fluid and clutch plates to minimize such troubles.

[AngelinaDella]

I've also experienced the Elantra's RPM surging while the speed crawls during driving, which is quite annoying. Usually, it's a problem with the power transmission system. For instance, clutch wear can prevent power from being properly delivered, or a clogged oil passage in the automatic transmission can cause slipping. Additionally, wheels jammed by foreign objects or a faulty driveshaft can also cause trouble. The inspection method is quite simple: park on a flat surface, shift to neutral, rev the engine, and observe the RPM response. If it's normal, the issue lies in the transmission part; if not, it might be an engine problem, but high RPM generally indicates the engine is fine. Pay attention to driving habits—avoid stomping on the accelerator, as it increases fuel consumption and damages the car. If this situation occurs, take the car to a professional repair shop as soon as possible for a diagnostic scan with a computer tool. Don't delay, as prolonged issues can lead to higher repair costs and affect your daily car budget.

[RichardFitz]

I understand that the situation of high RPM but slow acceleration is quite common, often caused by clutch slippage or internal transmission issues. For manual transmissions, check the clutch wear; for automatic transmissions, inspect whether the torque converter is faulty. This is closely related to safety because power interruption at high speeds can be very dangerous. If detected, pull over immediately and turn on the hazard lights. Check if the tires are slipping, though this is usually not the main cause. Simple self-checks like verifying low transmission fluid level or using a multimeter to detect abnormal voltage should prompt a visit to a technician. Safety first—don’t risk driving long distances.