Q: Car is revving high constantly with loud noise and makes the engine sluggish

asked by on

My car used to run fine, but recently it started revving high. The car doesn't rev only at startup and then returns to normal--it is revving constantly very high. At each stop light, it would go to high RPMs of around 2000 and then it would keep revving, while the engine seems to lose power. Then, I would slowly shift gears, but as soon as I gave it gas, it would rev high again and make loud noises. Everything else seems fine and there are no check engine light or any other warning lights on the dashboard. What is causing this revving?

The most common cause of this revving is either a stuck throttle or the mass airflow (MAF) sensor. This fault should be addressed as soon as possible for normal operation as this revving can become dangerous if the vehicle is allowed to accelerate unintentionally. The qualified technicians at YourMechanic can perform a diagnostic inspection of your loss of power issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Car is revving high constantly with loud noise and makes the engine sluggish

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Key stuck in ignition

This problem usually is the cause of a worn ignition lock cylinder. Sometimes you can jar the assembly loose while spraying electrical contact cleaner into the key hole. Do not use WD-40 or grease in the ignition lock cylinder. Spray...

Q: Low rpms no power 2003 Chevrolet Trailblazer

Is the Check Engine Light on? The throttle body assembly is a common failure item on this vehicle and can cause similar symptoms. In some cases, throttle body assembly will not open properly in accordance with the input from the...

Q: Q: Power steering.

Hey there, thank you for asking about your 2003 Chevrolet Suburban 1500. You may have a pump that has stuck vanes inside it. You can try and let it run a while until it gets the fluid hot and vanes...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.