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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  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: Does the throttle position sensor and thermostat need to be changed before I take a three hour trip?

The code for the thermostat is due to the engine coolant is not getting up to operating temperature quick enough and is due to a stuck open thermostat most likely. The TPS code may be an intermittent issue with sensor...

Q: The car takes about 5 cranks to start and once it does start the car jerks and only idles at about 500 rpm

This is a fuel supply problem. Fuel pressure will be the key indicator for which component of the fuel system isn't performing as needed. Check to be sure the fuel pump relay is good, and the fuel pump is running...

Q: A whoooo noise on the rear driver side underneath 03 for explorer.

Humming noises underneath a vehicle could be a metal to metal contact of two objects rubbing fast. This could be a heat shield, an exhaust pipe rubbing on the frame, or a tire that is rubbing the fender. Go under...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...